Improper access control in Chamilo LMS - CVE-2026-33698
Published: April 24, 2026
Vulnerability identifier: #VU127547
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-33698
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Chamilo
Affected software:
Chamilo LMS
Chamilo LMS
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to improper access control in the main/install directory when accessing otherwise-blocked PHP code. A remote attacker can enable PHP code in that directory and modify existing files or create new files to execute arbitrary code.
Only portals with the main/install/ directory still present and readable are vulnerable.
How to mitigate CVE-2026-33698
Install security update from vendor's website.