CVE-2026-33698 CRITICAL

CVE-2026-33698: Chamilo LMS affected by unauthenticated RCE in main/install folder

Vendor Chamilo
Product chamilo-lms
Weakness CWE-552 · Files accessible externally
Published April 10, 2026
Last update April 15, 2026
View on NVD All CVEs

CVSS base score

9.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

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

What the vulnerability does

01Description

Chamilo LMS is a learning management system. Prior to 1.11.38, a chained attack can enable otherwise-blocked PHP code from the main/install/ directory and allow an unauthenticated attacker to modify existing files or create new files where allowed by system permissions. This only affects portals with the main/install/ directory still present and read-accessible. This vulnerability is fixed in 1.11.38.

Key dates

02Disclosure timeline

April 10, 2026 CVE published
April 15, 2026 Record updated