Vulnerability · Published Apr 10, 2026 · Assigned by GitHub_M

CVE-2026-33702Chamilo LMS has an Insecure Direct Object Reference (IDOR)

High 7.1

In plain English

A high-severity authorization bypass via user-controlled key in chamilo-lms from chamilo. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities).

Severity (CVSS 3.1)7.1High

Exploit odds (30 days)0.2%top 85.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Chamilo LMS is a learning management system. Prior to 1.11.38 and 2.0.0-RC.3, Chamilo LMS contains an Insecure Direct Object Reference (IDOR) vulnerability in the Learning Path progress saving endpoint. The file lp_ajax_save_item.php accepts a uid (user ID) parameter directly from $_REQUEST and uses it to load and modify another user's Learning Path progress — including score, status, completion, and time — without verifying that the requesting user matches the target user ID. Any authenticated user enrolled in a course can overwrite another user's Learning Path progress by simply changing the uid parameter in the request. This vulnerability is fixed in 1.11.38 and 2.0.0-RC.3.

Affected products (as reported)

Vendor	Product	Versions
chamilo	chamilo-lms	< 1.11.38>= 2.0.0-alpha.1, < 2.0.0-RC.3

Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L

References

https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-3rv7-9fhx-j654 x_refsource_CONFIRM
https://github.com/chamilo/chamilo-lms/commit/6331d051b4468deb5830c01d1e047c5e5cf2c74f x_refsource_MISC
https://github.com/chamilo/chamilo-lms/commit/bf3f6c6949b5c882b48a9914baa19910417e4551 x_refsource_MISC