Use of insufficiently random values in Chamilo LMS - CVE-2026-33710
Published: April 24, 2026
Vulnerability identifier: #VU127549
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-33710
CWE-ID: CWE-330
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to use of insufficiently random values in REST API key generation in main/inc/lib/usermanager.lib.php when generating API keys. A remote attacker can brute-force a predictable API key to disclose sensitive information.
Exploitation requires knowledge of a username and an approximate API key creation time.
Affected software
Chamilo LMS
How to mitigate CVE-2026-33710
Install security update from vendor's website.
Chamilo LMS - update to 1.11.38