The newest Insecure Direct Object Reference (IDOR) resources are on the Insecure Direct Object Reference (IDOR) page. For a reading order instead of a date order, see the Insecure Direct Object Reference (IDOR) learning path.
| Date Added | Link | Excerpt |
|---|---|---|
| 2026-04-16 2026 | How to Find IDORs Like a Pro intermediate | How to Find IDORs Like a Pro |
| 2026-04-10 2026 | IDOR - PortSwigger Web Security beginner 2 min read AuthZ | Reference detailing Insecure Direct Object References (IDOR), a common access control vulnerability popularized by OWASP. It explains how applications using user-supplied input directly to access objects, such as database records via `customer_number` parameters or static files by filename, can lead to horizontal or vertical privilege escalation. Examples include accessing other customers' accounts or sensitive chat transcripts. → portswigger.net |
| 2026-04-10 2026 | IDOR - OWASP Foundation beginner 3 min read | Reference detailing Insecure Direct Object Reference (IDOR) vulnerabilities, a class of Broken Access Control (OWASP Top 10 A01:2025). IDOR occurs when applications expose internal object references, like database keys or file names, without verifying user authorization, allowing attackers to access unauthorized resources by modifying these references in URL path parameters, query strings, or request bodies. Prevention strategies include enforcing server-side authorization, using non-sequential identifiers, applying the principle of least privilege, and validating access at the data layer. → owasp.org |
| 2026-04-10 2026 | How-To: Find IDOR Vulnerabilities for Large Bounty Rewards intermediate | How-To: Find IDOR Vulnerabilities for Large Bounty Rewards → bugcrowd.com |
| 2026-04-10 2026 | Bug Bounty Hunting: Insecure Direct Object References beginner | Bug Bounty Hunting: Insecure Direct Object References |
| 2026-04-10 2026 | How I Found Easy IDOR: Bug Bounty Writeup intermediate | How I Found Easy IDOR: Bug Bounty Writeup |
| 2026-04-10 2026 | HackerOne Report: IDOR Allows Viewing news | HackerOne Report: IDOR Allows Viewing → hackerone.com |
| 2026-04-10 2026 | CVE-2025-67274: Broken Access Control BOLA in aangine news AuthZ | CVE-2025-67274: Broken Access Control BOLA in aangine |
| 2026-04-10 2026 | CVE-2026-33312: BOLA in Vikunja Project news 4 min read AuthZ | Writeup detailing CVE-2026-33312, a Broken Object Level Authorization (BOLA) vulnerability in Vikunja versions 0.20.2 through 2.1.x. This flaw allows read-only users to permanently delete project background images by exploiting an incorrect authorization check that reuses a read-focused validation helper function for delete operations. The vulnerability, fixed in version 2.2.0, results in a low-level integrity compromise with a CVSS 4.0 base score of 5.3, impacting the application's aesthetic configuration and exposing broader access control risks. |
| 2026-04-10 2026 | IDOR Prevention Cheat Sheet beginner 2 min read | Cheatsheet detailing Insecure Direct Object Reference (IDOR) prevention techniques. It explains how IDOR vulnerabilities arise from missing access control checks, allowing attackers to manipulate identifiers in URLs or POST bodies to access unauthorized data. The guide recommends implementing server-side access control for every object, using complex identifiers as a secondary defense, and determining the authenticated user from session information rather than exposed parameters. It provides code examples, such as in Ruby on Rails, demonstrating how to securely scope object lookups to the current user's accessible datasets. → cheatsheetseries.owasp.org |
| 2026-04-10 2026 | IDOR Writeup TryHackMe intermediate | IDOR Writeup TryHackMe |
| 2026-04-10 2026 | What is IDOR? Complete Guide beginner 9 min read | Guide to Insecure Direct Object References (IDOR), this document details how broken access control vulnerabilities allow attackers to manipulate direct object references like database keys or query parameters to access unauthorized data. It covers how IDORs work, including URL tampering, body manipulation, and cookie/JSON manipulation, and explains the risks such as data confidentiality breaches and integrity corruption. The guide also discusses detection methods using tools like Burp Suite and OWASP ZAP, and prevention techniques involving robust access control and session management. |
| 2026-04-10 2026 | IDOR - MDN Web Security beginner 4 min read | Reference detailing Insecure Direct Object Reference (IDOR) vulnerabilities. This security weakness arises from insufficient access control, allowing attackers to exploit exposed object identifiers like database keys or file paths. The document explains how attackers can manipulate URLs, hidden form fields, or file references to gain unauthorized access to other users' data. It provides examples of vulnerable Express.js code and demonstrates how to mitigate IDOR by implementing robust server-side authorization checks and using non-guessable identifiers such as UUIDs. |
| 2026-04-10 2026 | Insecure Direct Object Reference (IDOR) - A Deep Dive advanced 5 min read | Library covering Insecure Direct Object Reference (IDOR) vulnerabilities, detailing exploitation techniques such as ID parameter manipulation, direct request, mass assignment, token prediction, file path traversal, and API endpoint enumeration. It provides code examples for vulnerable and remediated scenarios, highlighting the impact of IDORs and mentioning CVE-2023-4836 in the User Private Files plugin for WordPress. Remediation strategies include implementing proper access control, using indirect references, employing GUIDs, and validating user input. |
| 2026-04-06 2026 | Web Application Security Testing: A Step-by-Step Learning Guide beginner 6 min read | Guide detailing the foundational concepts of web application security testing, including HTTP fundamentals, HTML/JavaScript basics, and proficiency with Burp Suite. It emphasizes a structured approach, covering reconnaissance, application mapping, systematic testing against the OWASP Top 10, exploitation, and reporting. The guide outlines a step-by-step learning progression from understanding HTTP and mastering Burp Suite to systematically practicing OWASP Top 10 vulnerabilities and applying a professional methodology on unguided machines. |
| 2026-04-06 2026 | CVE-2026-33030: Nginx UI Authorization Bypass news 4 min read | Analysis of CVE-2026-33030 reveals an Insecure Direct Object Reference (IDOR) vulnerability in Nginx UI versions 2.3.3 and prior. This flaw allows any authenticated user to bypass authorization controls, enabling unauthorized access, modification, and deletion of other users' resources due to a lack of user ownership verification in resource endpoint queries. The vulnerability stems from the base Model struct missing a user_id field, leading to broken access control, particularly in multi-user environments. → sentinelone.com |
| 2026-04-06 2026 | GraphQL Security: How I Found and Exploited Critical IDOR and Authorization Bypass intermediate GraphQL | GraphQL Security: How I Found and Exploited Critical IDOR and Authorization Bypass → infosecwriteups.com |
| 2026-04-06 2026 | BugQuest 2026: 31 Days of Broken Access Control beginner 7 min read AuthZ | Library of 31 daily posts from BugQuest 2026, detailing broken access control vulnerabilities. This resource covers authentication versus authorization, common authorization models like RBAC, and various discovery and exploitation techniques, including GraphQL introspection, JWT algorithm confusion, IDOR, request method tampering, and HTTP parameter pollution. It provides practical methods for finding BAC flaws in web applications, APIs, and mobile apps, with a focus on real-world scenarios and reporting. → intigriti.com |
| 2026-04-03 2026 | IDOR Attack Guide | Hackviser beginner 7 min read AuthZ | Guide detailing Insecure Direct Object Reference (IDOR) vulnerabilities, explaining how attackers exploit missing authorization checks in applications. It covers manual testing techniques including URL parameter, POST body, HTTP header, cookie, file access, and API endpoint manipulation. The guide also outlines automated discovery methods using Burp Suite and ffuf, and explores attack vectors like numeric and GUID/UUID manipulation, hash-based bypass, parameter pollution, mass assignment, and blind IDOR exploitation. |
| 2026-04-03 2026 | Reddit Bug Bounty: Exploiting an IDOR Vulnerability in Dubsmash's API intermediate 2 min read | Writeup detailing the exploitation of an Insecure Direct Object Reference (IDOR) vulnerability in Dubsmash's UpdateSound GraphQL API. The flaw allowed unauthorized modification of any soundtrack's metadata by bypassing authorization checks on the `uuid` parameter. The writeup outlines the process of capturing requests with Burp Suite, altering the `uuid`, and forwarding the manipulated request to change soundtrack titles, potentially affecting the entire music library. |
| 2026-04-03 2026 | IDOR: The $1 Billion Authorization Bug beginner | IDOR: The $1 Billion Authorization Bug |
| 2026-04-03 2026 | IDOR Vulnerability: Analysis, Impact, Mitigation | Huntress beginner 4 min read | Reference detailing Insecure Direct Object Reference (IDOR) vulnerabilities, an access control flaw where applications use user-supplied input to directly access objects. It explains how attackers manipulate identifiers in URLs, form fields, or API requests to bypass authorization and access unauthorized resources, impacting products across any technology stack. Detection involves DAST and manual code review, while mitigation focuses on avoiding direct object references or implementing strict server-side access control checks. |
| 2026-04-03 2026 | How to Find IDOR Vulnerabilities: The Bug Bounty Hunter's Practical Guide intermediate 5 min read | Guide to finding Insecure Direct Object References (IDOR) in bug bounty hunting, covering common IDOR patterns, including sequential integers, encoded IDs like base64, and MD5 hashes. It emphasizes the necessity of testing with two accounts, explores various IDOR types like read, write, delete, and function-level, and details methods for both manual and automated detection using tools like Burp Suite and ffuf. The guide also provides a framework for reporting IDOR vulnerabilities and suggests practice targets such as DVWA and PortSwigger Web Academy. |
| 2026-04-03 2026 | Insecure Direct Object References (IDOR) | Intigriti Hackademy beginner 3 min read | Walkthrough of Insecure Direct Object Reference (IDOR) vulnerabilities, explaining how attackers bypass authorization by manipulating user-supplied input to directly access sensitive resources like database records or files. This guide details the impact on confidentiality, integrity, and availability, and emphasizes prevention through strict access control checks, referencing OWASP's cheat sheet for further details. → intigriti.com |
| 2026-04-03 2026 | IDOR in 2025: Why Broken Access Control Still Rules the Vulnerability Charts beginner | IDOR in 2025: Why Broken Access Control Still Rules the Vulnerability Charts |
| 2026-04-03 2026 | IDOR: A Complete Guide to Exploiting Advanced IDOR Vulnerabilities | Intigriti intermediate 8 min read | Guide covering Insecure Direct Object Reference (IDOR) vulnerabilities, detailing methods to identify and exploit them, including basic IDORs, parameter pollution, JSON globbing, method-based variations, content-type manipulation, deprecated API versions, static keywords, and unpredictable IDs. → intigriti.com |
| 2026-01-29 2026 | How I Made Burp Suite My IDOR-Finding Robot Butler (And Found 20+ Bugs) 🤖🔍 intermediate Bug Bounty Burp | The content titled "How I Made Burp Suite My IDOR-Finding Robot Butler (And Found 20+ Bugs)" likely discusses utilizing the Burp Suite tool to automate the discovery of Insecure Direct Object Reference (IDOR) vulnerabilities, leading to the identification of over 20 bugs. The author shares their experience and strategies for leveraging Burp Suite effectively in bug hunting. The content may provide insights into the process of using automation tools for security testing and the successful outcomes achieved through this approach. → infosecwriteups.com |
| 2025-08-14 2025 | devanshbatham/Vulnerabilities-Unmasked beginner 14 min read CSRF XSS | Library of simplified explanations for complex security vulnerabilities, including Cross-Site Scripting (XSS), SQL Injection, Cross-Site Request Forgery (CSRF), ClickJacking, Subdomain Takeover, Privilege Escalation, RBAC Vulnerabilities, Server-Side Request Forgery (SSRF), Vulnerable and Outdated Components, Local File Inclusion (LFI), Denial of Service (DOS), Authentication Bypass, Insecure Direct Object Reference (IDOR), 2FA Bypass, and Race Condition Vulnerabilities. Analogies are provided to illustrate concepts like toy boxes, magic notebooks, and playgrounds for educational purposes. |
| 2025-08-14 2025 | ??Roadmap to Cybersecurity in 2022, Full-Read SSRF, IDOR in GraphQL, GCP P beginner SSRF | The content mentions a roadmap to cybersecurity in 2022, focusing on topics like Full-Read SSRF, IDOR in GraphQL, and GCP P. It suggests a plan or guide for enhancing cybersecurity practices in the upcoming year, highlighting specific areas of concern and potential vulnerabilities to address. The content seems to offer insights or strategies related to cybersecurity trends and challenges for the year ahead, including the importance of understanding SSRF, IDOR, and GCP security measures. |
| 2025-08-14 2025 | Finding More IDORs – Tips and Tricks intermediate 9 min read | Library of tips and techniques for finding Insecure Direct Object References (IDORs). This resource covers object scope, API route pattern discovery using tools like Burp Suite Intruder or FFUF, adding unexpected IDs, replacing parameter names with tools like Paramalyzer, HTTP parameter pollution, and altering HTTP request methods or content types to bypass access controls. |
| 2025-08-14 2025 | Jobert Abma on Twitter: "Hacker tip: when you’re looking for IDORs in a mod intermediate | Jobert Abma shared a hacker tip on Twitter about finding IDORs in a mod. This tweet suggests that Jobert Abma is providing advice or guidance related to hacking techniques, specifically focusing on Insecure Direct Object References (IDORs) within a mod. |
| 2025-08-14 2025 | Inf0rM@tion Disclosure via IDOR - Pratyush Anjan Sarangi - Medium intermediate | The content is titled "Inf0rM@tion Disclosure via IDOR" by Pratyush Anjan Sarangi on Medium. It likely discusses Information Disclosure through Insecure Direct Object References (IDOR) in web applications. This vulnerability allows unauthorized access to sensitive data by manipulating object references. The article may delve into the impact of IDOR on security and ways to prevent such disclosures. |
| 2025-08-14 2025 | HTTP Request Smuggling IDOR - Hipotermia intermediate 3 min read | Writeup detailing HTTP Request Smuggling chained with an IDOR vulnerability. This technique exploits CL.TE desynchronization using Burp's Request Smuggler plugin to inject a smuggled request that targets an endpoint like `/addCard`, allowing the attacker to add data to a victim's account by manipulating the `Transfer-Encoding` and `Content-Length` headers. The analysis demonstrates crafting requests to modify subsequent user requests and ultimately hijack sensitive information retrieval. |
| 2025-08-14 2025 | Stories Of IDOR-Part 2 - InfoSec Write-ups - Medium intermediate | The content seems to be a continuation of a series called "Stories Of IDOR" focusing on cybersecurity write-ups. It is likely published on the Medium platform. The content may delve into stories related to Insecure Direct Object References (IDOR) in the realm of information security. This series could provide insights, analysis, and possibly solutions related to IDOR vulnerabilities. |
| 2025-08-14 2025 | How I could delete Facebook Ask for Recommendations post’s place objects in intermediate | The content discusses how to delete the location tags associated with Facebook Ask for Recommendations posts. It focuses on removing the specific place objects that are linked to these posts. |
| 2025-08-14 2025 | Chains on Chains!! Chaining several IDOR’s into Account Takeover(PART ONE) intermediate | The content appears to discuss chaining multiple Insecure Direct Object References (IDORs) to execute an Account Takeover attack. This process involves exploiting vulnerabilities in the way user permissions are handled to gain unauthorized access to user accounts. The title suggests that this is part one of a series of articles or guides on this topic. |
| 2025-02-27 2025 | GitHub - errorfiathck/IDOR-Forge: IDOR Forge is an advanced and versatile tool designed to detect Insecure Direct Object Reference (IDOR) vulnerabilities in web applications. intermediate 4 min read | Tool for detecting Insecure Direct Object Reference (IDOR) vulnerabilities in web applications. IDOR Forge dynamically generates and tests payloads across various HTTP methods (GET, POST, PUT, DELETE), scans multiple parameters, and supports proxy integration. It includes features like sensitive data detection, rate limiting handling, concurrent scanning for efficiency, and offers both a command-line interface and an interactive GUI. The tool can output results in TXT or CSV formats and tests a wide array of payload types including SQL injection and file path traversal. |
| 2023-09-22 2023 | IDOR - how to predict an identifier? Bug bounty case study intermediate Bug Bounty Talks | The content discusses IDOR (Insecure Direct Object Reference) vulnerability in bug bounty programs, focusing on predicting identifiers to exploit this flaw. The video likely provides a case study demonstrating how this vulnerability can be leveraged for unauthorized access. It is essential for security professionals and bug bounty hunters to understand and address IDOR vulnerabilities to protect systems and data. |
| 2021-12-25 2021 | How I Get $1350 From IDOR Just Less 1 hours intermediate | How I Get $1350 From IDOR Just Less 1 hours |
| 2021-10-04 2021 | 10 Types of Web Vulnerabilities that are Often Missed beginner 16 min read Bug Bounty SQLi SSRF XSS | Library of web vulnerabilities often overlooked by security testers, including HTTP/2 smuggling, XXE via Office Open XML parsers, SSRF via XSS in PDF generators, and XSS via SVG files. This resource delves into obscure bug classes and less common approaches to traditional vulnerabilities, providing insights for bug bounty hunters and security professionals. It references techniques and tools like `http2smugl` and discussions from Defcon presentations. → labs.detectify.com |
| 2021-07-28 2021 | Chaining password reset link poisoning IDOR and information leakage to achieve account takeover at api.redacted.com advanced AuthZ Bug Bounty | A security researcher successfully exploited a vulnerability at api.redacted.com, achieving account takeover. The attack involved chaining together three distinct vulnerabilities: password reset link poisoning, an Insecure Direct Object Reference (IDOR), and information leakage. This combination allowed the attacker to gain unauthorized access to user accounts. |
| 2021-07-19 2021 | Leveraging Burp Suite extension for finding IDOR(Insecure Direct Object Reference). intermediate Burp | This content describes using a Burp Suite extension to discover Insecure Direct Object References (IDORs). IDOR vulnerabilities allow attackers to access unauthorized data by manipulating object references. The extension likely automates or streamlines the process of identifying these weaknesses. |
| 2021-02-13 2021 | Finding more IDORs – Tips and Tricks | Aon intermediate | The content provides a compilation of helpful tips, tricks, and techniques aimed at uncovering Insecure Direct Object References (IDORs). It offers guidance on how to identify and exploit these vulnerabilities effectively. |
| 2021-01-24 2021 | All About IDOR Attacks beginner | IDOR attacks involve exploiting vulnerabilities in systems that allow attackers to access data they are not authorized to view. Insecure Direct Object References occur when an application exposes internal implementation objects, such as files or database records, to users without proper authentication. Attackers can manipulate parameters to access sensitive information or perform unauthorized actions. Preventing IDOR attacks requires implementing proper access controls, validating user input, and ensuring that sensitive data is not exposed directly. Understanding how IDOR attacks work is crucial for organizations to protect their data and systems from unauthorized access and potential breaches. |
| 2020-01-13 2020 | GraphQL IDOR leads to information disclosure - Eshan Singh - Medium intermediate GraphQL | Eshan Singh, also known as R0X4R, discusses a recent discovery related to GraphQL IDOR (Insecure Direct Object Reference) leading to information disclosure. Singh shares insights and details about this vulnerability in the Medium article. |