# CVE-2026-34160: Chamilo LMS unauthenticated SSRF in PENS plugin

Source: https://junglewise.ai/threats/cve-2026-34160-chamilo-lms-unauthenticated-ssrf-in-pens-plugin  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-14. Updated: 2026-07-25  
License: CC BY 4.0 with a link back

CVE-2026-34160 · Severity: high · CVSS 8.6 · Published 2026-04-14

Chamilo LMS, an open-source learning management system, contains a security flaw in its PENS plugin. An unauthenticated attacker can force the server to make requests to internal network locations that are normally protected. This could allow an attacker to steal sensitive cloud credentials, probe internal databases, or access private administrative services, potentially leading to a broader compromise of the organization's infrastructure.

Technologies: [Chamilo Lms](https://junglewise.ai/threats/technologies/chamilo-lms). Vendors: [Chamilo](https://junglewise.ai/threats/vendors/chamilo).

## Quick answers

**Is CVE-2026-34160 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-34160 being exploited in the wild.

**How severe is CVE-2026-34160?** High severity, with a CVSS score of 8.6, published 14 April 2026.

**Which products and versions are affected?** Chamilo Lms < 2.0.0-RC.3.

**Is there a fix for CVE-2026-34160?** A patch was published on 2026-04-01: Version 2.0.0-RC.3 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-34160 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-34160?** Check whether you run Chamilo Lms at an affected version. 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

An unauthenticated Server-Side Request Forgery (SSRF) vulnerability exists in Chamilo LMS versions prior to 2.0.0-RC.3 within the PENS (Package Exchange Notification Services) plugin. The endpoint at 'public/plugin/Pens/pens.php' fails to authenticate requests and accepts a user-controlled 'package-url' parameter. This parameter is processed via curl without filtering for private or reserved IP ranges. Attackers can exploit this to perform internal network reconnaissance, access cloud metadata services (e.g., 169.254.169.254) to retrieve IAM credentials, or interact with internal APIs via the 'receipt' and 'alerts' callback parameters. The issue is fixed in version 2.0.0-RC.3 by implementing stricter URL validation logic.

## Affected products

- Chamilo Chamilo LMS < 2.0.0-RC.3

## Timeline

- 2026-04-01: patched: Version 2.0.0-RC.3 released
- 2026-04-14: disclosed: Security advisory published
- 2026-04-14: advisory: CVE-2026-34160 assigned

## References

- [https://github.com/chamilo/chamilo-lms/commit/de4058d76fac2413afd023b1ec942e8e79579011](https://github.com/chamilo/chamilo-lms/commit/de4058d76fac2413afd023b1ec942e8e79579011)
- [https://github.com/chamilo/chamilo-lms/releases/tag/v2.0.0-RC.3](https://github.com/chamilo/chamilo-lms/releases/tag/v2.0.0-RC.3)
- [https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-g2xj-4cch-j276](https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-g2xj-4cch-j276)

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