What is CVE-2025-55208?

CVE-2025-55208 is a critical-severity vulnerability in Chamilo Chamilo-lms, classified under Cross-site Scripting. CVSS score: 9.0/10. Published 2026-03-05.

How severe is CVE-2025-55208?

Critical severity. CVSS v3 base score is 9.0 out of 10.

XSS in Chamilo Chamilo-lms

CVE-2025-55208

Chamilo is a learning management system. Versions prior to 1.11.34 have a Stored XSS through insecure file uploads in `Social Networks`. Through it, a low-privilege user can execute arbitrary code in the admin user inbox, allowing takeover…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.003 (22.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H.

Affected products

Chamilo Chamilo-lms — versions < 1.11.34
Chamilo Chamilo_lms

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2025-55208?: CVE-2025-55208 is a critical-severity vulnerability in Chamilo Chamilo-lms, classified under Cross-site Scripting. CVSS score: 9.0/10. Published 2026-03-05.
How severe is CVE-2025-55208?: Critical severity. CVSS v3 base score is 9.0 out of 10.