Is CVE-2026-33707 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-33707 being exploited in the wild.

How severe is CVE-2026-33707?

Critical severity, with a CVSS score of 9.4, published 10 April 2026.

Which products and versions are affected?

Chamilo Chamilo LMS < 1.11.38, < 2.0.0-RC.3.

Is there a fix for CVE-2026-33707?

A patch was published on 2026-04-10. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-33707 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-33707?

Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-33707: Chamilo LMS weak password recovery mechanism in login.lib.php

Q: Which products and versions are affected?

Chamilo Chamilo LMS < 1.11.38, < 2.0.0-RC.3.

Q: Is there a fix for CVE-2026-33707?

A patch was published on 2026-04-10. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-33707 attacked?

It is attacked over the network, in a network appliance.

Q: Am I affected by CVE-2026-33707?

Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-33707 · Severity: critical · CVSS 9.4 · Published 2026-04-10

Chamilo LMS, a widely used learning management system, contains a critical flaw in its password recovery system. An attacker who knows a user's email address can mathematically predict their password reset link and take over their account without any interaction from the victim. This could lead to unauthorized access to student data, course materials, and administrative controls.

Quick answers

Is CVE-2026-33707 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-33707 being exploited in the wild.
How severe is CVE-2026-33707?: Critical severity, with a CVSS score of 9.4, published 10 April 2026.
Which products and versions are affected?: Chamilo Chamilo LMS < 1.11.38, < 2.0.0-RC.3.
Is there a fix for CVE-2026-33707?: A patch was published on 2026-04-10. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-33707 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-33707?: Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A vulnerability in the default password reset mechanism of Chamilo LMS (located in login.lib.php) stems from the use of a deterministic token generation algorithm. The system generates reset tokens by simply calculating the SHA-1 hash of the user's email address without incorporating any random salts, expiration timestamps, or rate limiting. Because the token is static and predictable, an attacker can compute the 'secret' word for any known email address and submit a password reset request directly. This is further exacerbated by the use of sequential user IDs and the lack of a requirement for a reset to be initiated by the legitimate user. The issue is resolved in versions 1.11.38 and 2.0.0-RC.3.

Affected products

Chamilo Chamilo LMS < 1.11.38, < 2.0.0-RC.3

Timeline

2026-04-10: disclosed
2026-04-10: advisory
2026-04-10: patched

References

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