Weak Password Recovery Mechanism for Forgotten Password in Chamilo LMS - CVE-2026-33707
Published: April 24, 2026
Vulnerability identifier: #VU127551
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-33707
CWE-ID: CWE-640
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 take over arbitrary user accounts.
The vulnerability exists due to a weak password recovery mechanism in main/inc/lib/login.lib.php when processing password reset requests. A remote attacker can compute a deterministic reset token from a known email address and submit a crafted password reset request to take over arbitrary user accounts.
This issue affects the default password reset path when the user_reset_password setting is disabled, and no prior reset request or user interaction is required.
How to mitigate CVE-2026-33707
Install security update from vendor's website.