CVE-2026-33736 Chamilo LMS has an Insecure Direct Object Reference (IDOR) - User Data Exposure
Authenticated users can access sensitive personal information of all platform users, including administrators, via the API.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-33736?
CVE-2026-33736 is a medium-severity missing authorization vulnerability in Chamilo Chamilo Lms, published on 10 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Chamilo LMS is a learning management system. Prior to 2.0.0-RC.3, any authenticated user (including ROLE_STUDENT) can enumerate all platform users and access personal information (email, phone, roles) via GET /api/users, including administrator accounts. This vulnerability is fixed in 2.0.0-RC.3.
Weakness: CWE-639
Which versions are affected by CVE-2026-33736?
It affects 1 product.
Products include Chamilo Chamilo Lms.
How do I fix CVE-2026-33736?
No fix has been published for CVE-2026-33736 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-33736 being exploited?
There is no known exploitation of CVE-2026-33736 in the wild and no public exploit code.
Other vulnerabilities in Chamilo Chamilo Lms
Sources
Also known as GHSA-fp2p-fj6c-x3x9.