What is CVE-2025-52563?

CVE-2025-52563 is a medium-severity vulnerability in Chamilo Chamilo-Lms, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-03-02.

How severe is CVE-2025-52563?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Chamilo Chamilo-Lms

CVE-2025-52563

Chamilo is a learning management system. Prior to version 1.11.30, there is a reflected cross-site scripting (XSS) vulnerability due to insufficient sanitization of the page parameter in the session/add_users_to_session.php endpoint. This issue has been patched in version 1.11.30.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (5.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Chamilo Chamilo-lms — versions < 1.11.30
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-2025-52563?: CVE-2025-52563 is a medium-severity vulnerability in Chamilo Chamilo-Lms, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-03-02.
How severe is CVE-2025-52563?: Medium severity. CVSS v3 base score is 6.1 out of 10.