What is CVE-2025-59540?

CVE-2025-59540 is a medium-severity vulnerability in Chamilo Chamilo-Lms, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-03-06.

How severe is CVE-2025-59540?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Chamilo Chamilo-Lms

CVE-2025-59540

Chamilo is a learning management system. Prior to version 1.11.34, a stored XSS vulnerability exists in Chamilo LMS that allows a staff account to execute arbitrary JavaScript in the browser of higher-privileged admin users. The issue arises because feedback input in the exercise history page is not properly encoded before rendering, allowing malicious scripts to persist in the database and execute on view. This issue has been patched in version 1.11.34.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (7.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Chamilo Chamilo-lms — versions < 1.11.34
Chamilo Chamilo_lms

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
security-advisories@github.com (Product, x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2025-59540?: CVE-2025-59540 is a medium-severity vulnerability in Chamilo Chamilo-Lms, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-03-06.
How severe is CVE-2025-59540?: Medium severity. CVSS v3 base score is 5.4 out of 10.