What is insecure direct object reference?
Insecure Direct Object Reference (IDOR) is a type of attack that exploits a security vulnerability, allowing an attacker to gain unauthorized access to sensitive data or objects within a system.
Azərbaycanca: Qeyri-təhlükəsiz birbaşa obyektə istinad (Insecure Direct Object Reference, IDOR) hücumu, təhlükəsizlik zəifliyindən istifadə edərək, hücumçunun sistemdəki həssas məlumatlara və ya obyektlərə icazəsiz daxil olmasına imkan verən bir hücum növüdür.
How it works
IDOR occurs when an application directly references objects (e.g., database records) based on user-supplied input parameters without performing the necessary authorization checks. This enables attackers to manipulate object identifiers and access sensitive information.
Defense checklist6
- 01
Validate and sanitize user input parameters
- 02
Perform authorization checks before granting access to objects
- 03
Use indirect references for sensitive objects
- 04
Regularly conduct security testing of the application
- 05
Apply security updates and patches in a timely manner
- 06
Monitor and log user activities
Real-world evidence
Cases such as CVE-2026-13464, CVE-2026-16797, CVE-2026-63241, CVE-2026-5060, CVE-2025-60931, CVE-2026-67348, CVE-2026-67310, CVE-2025-71400, CVE-2026-69094, CVE-2026-70561, CVE-2026-19424, CVE-2026-72543 demonstrate how IDOR vulnerabilities are exploited in real-world scenarios.
Sources
- CVE-2026-13464: The Kirki – Freeform Page Builder, Website Builder & Customizer plugin for WordPress is vunvd
- CVE-2026-16797: The ShopLentor – All-in-One WooCommerce Growth & Store Enhancement Plugin plugin for WordPnvd
- CVE-2026-63241: An insecure direct object reference vulnerability in Koollab LMS allowed an authenticatednvd
- CVE-2026-5060: The MasterStudy LMS WordPress Plugin – for Online Courses and Education plugin for WordPrenvd
- CVE-2025-60931: An Insecure Direct Object Reference (IDOR) in the Employee Compensation View function of Invd
- CVE-2026-67348: Julep contains an insecure direct object reference vulnerability in the get_execution_detanvd
- CVE-2026-67310: OpenRemote (org.openremote:openremote) versions <= 1.26.2 contain an insecure direct objecnvd
- CVE-2025-71400: better-auth passkey versions before 1.4.0 contain an insecure direct object reference vulnnvd
- CVE-2026-69094: Admidio before 5.0.11 contains an insecure direct object reference vulnerability in the sanvd
- CVE-2026-70561: TestLink 1.9.20 and prior contains an insecure direct object reference vulnerability thatnvd
- CVE-2026-19424: Chiline Cloud developed by Inventec Appliances has a Insecure Direct Object Reference vulnnvd
- CVE-2026-72543: An insecure direct object reference vulnerability in OpenSignLabs OpenSign through 2.37.0nvd
Other attack types
See also6
This guide is AI-written from the real incident sources skopnix collected — the examples above are drawn from those cited items, nothing is invented.