Chamilo LMS up to 1.11.37/2.0.0-RC.2 Password Reset email password recovery

Summaryinfo

A vulnerability was found in Chamilo LMS up to 1.11.37/2.0.0-RC.2. It has been rated as problematic. The affected element is an unknown function of the component Password Reset Handler. This manipulation of the argument email causes password recovery. This vulnerability appears as CVE-2026-33707. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as problematic was found in Chamilo LMS up to 1.11.37/2.0.0-RC.2. Affected by this vulnerability is an unknown function of the component Password Reset Handler. The manipulation of the argument email with an unknown input leads to a password recovery vulnerability. The CWE definition for the vulnerability is CWE-640. The product contains a mechanism for users to recover or change their passwords without knowing the original password, but the mechanism is weak. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-33707 since 03/23/2026. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1552 according to MITRE ATT&CK.

Upgrading to version 1.11.38 or 2.0.0-RC.3 eliminates this vulnerability. Applying the patch 078d7e5b77679fa7ccfcd6783bd5cc683db0bda8 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

• Content Management System

Vendor

• Chamilo

Name

• LMS

Version

• 1.11.0
• 1.11.1
• 1.11.2
• 1.11.3
• 1.11.4
• 1.11.5
• 1.11.6
• 1.11.7
• 1.11.8
• 1.11.9
• 1.11.10
• 1.11.11
• 1.11.12
• 1.11.13
• 1.11.14
• 1.11.15
• 1.11.16
• 1.11.17
• 1.11.18
• 1.11.19
• 1.11.20
• 1.11.21
• 1.11.22
• 1.11.23
• 1.11.24
• 1.11.25
• 1.11.26
• 1.11.27
• 1.11.28
• 1.11.29
• 1.11.30
• 1.11.31
• 1.11.32
• 1.11.33
• 1.11.34
• 1.11.35
• 1.11.36
• 1.11.37
• 2.0.0-RC.0
• 2.0.0-RC.1
• 2.0.0-RC.2

License

• open-source

CPE 2.3info

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CPE 2.2info

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