CVE-2026-33707 Weak Password Recovery Mechanism for Forgotten Password in chamilo/chamilo-lms

Critical 9.4 Published 10 Apr 2026 Updated 13 Apr 2026

Attackers can predict password reset tokens to take over accounts in Chamilo LMS due to weak token generation.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-33707?

CVE-2026-33707 is a critical vulnerability in Chamilo Chamilo Lms, published on 10 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Chamilo LMS is a learning management system. Prior to 1.11.38 and 2.0.0-RC.3, the default password reset mechanism generates tokens using sha1($email) with no random component, no expiration, and no rate limiting. An attacker who knows a user's email can compute the reset token and change the victim's password without authentication. This vulnerability is fixed in 1.11.38 and 2.0.0-RC.3.

Weakness: CWE-640

Which versions are affected by CVE-2026-33707?

It affects 1 product.

Products include Chamilo Chamilo Lms.

How do I fix CVE-2026-33707?

No fix has been published for CVE-2026-33707 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-33707 being exploited?

There is no known exploitation of CVE-2026-33707 in the wild and no public exploit code.

All Chamilo Chamilo Lms vulnerabilities

Sources

Also known as GHSA-f27g-66gq-g7v2.