Missing Authorization in Chamilo LMS - CVE-2026-61660
Published: August 4, 2026
Vulnerability identifier: #VU140905
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-61660
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to escalate privileges.
The vulnerability exists due to missing authorization in ValidationTokenController when handling validation-token generation and redemption requests. A remote user can send crafted requests to forge validation tokens for arbitrary resources and invoke privileged token-gated operations to escalate privileges.
The issue includes an exposed test/debug token-generation endpoint and the token redemption flow honors an attacker-supplied user_id, allowing actions to be applied to other users.
Affected software
Chamilo LMS
How to mitigate CVE-2026-61660
Install security update from vendor's website.
Chamilo LMS - update to 2.0.3