CVE-2026-33707

CRITICAL

Weak Password Recovery Mechanism for Forgotten Password in chamilo/chamilo-lms

Title source: cna

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.

References (3)

[X_Refsource_Confirm] https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-f27g-66gq-g7v2

[X_Refsource_Misc] https://github.com/chamilo/chamilo-lms/commit/078d7e5b77679fa7ccfcd6783bd5cc683db0bda8

[X_Refsource_Misc] https://github.com/chamilo/chamilo-lms/commit/750a45312a0d5c3ad60dbfbd0d959ca40be4a18c

View Writeup ZIP pw:eip

Scores

CVSS v3 9.4

EPSS 0.0008

EPSS Percentile 24.5%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

Details

CWE

CWE-640

Status published

Products (4)

chamilo/chamilo-lms < 1.11.38

chamilo/chamilo-lms >= 2.0.0-alpha.1, < 2.0.0-RC.3

chamilo/chamilo_lms 2.0.0 alpha1 (10 CPE variants)

chamilo/chamilo_lms < 1.11.38

Published Apr 10, 2026

Tracked Since Apr 11, 2026