What’s Vulnerable › Vulnerabilities

CVE-2025-59543: Chamilo: Account Takeover via Stored XSS in Course Description

• Severity: critical (CVSS 9.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-06 · updated 2026-06-17
• Weakness: CWE-79

Description

Chamilo is a learning management system. Prior to version 1.11.34, there is a stored cross-site scripting (XSS) vulnerability. By injecting malicious JavaScript into the course description field, an attacker with a low-privileged account (e.g., trainer) can execute arbitrary JavaScript code in the context of any other user viewing the course information page, including administrators. This allows an attacker to exfiltrate sensitive session cookies or tokens, resulting in account takeover (ATO) of higher-privileged users. This issue has been patched in version 1.11.34.

Affected products

• chamilo-lms: before 1.11.34 — fixed in 1.11.34

How to fix

Upgrade to a fixed version: chamilo-lms 1.11.34. Check the vendor advisory for mitigations.

References

• https://github.com/chamilo/chamilo-lms/releases/tag/v1.11.34
• https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-p32q-6gh3-3gcv

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