Medium severity6.1NVD Advisory· Published Mar 2, 2026· Updated Jun 17, 2026

CVE-2025-52563

Description

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.

Affected products

Chamilo/Lms2 versions
cpe:2.3:a:chamilo:chamilo_lms:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:chamilo:chamilo_lms:*:*:*:*:*:*:*:*range: <1.11.30
- (no CPE)range: < 1.11.30
Chamilo/Chamilollm-fuzzy
Range: <1.11.30

Patches

Vulnerability mechanics

References

github.com/chamilo/chamilo-lms/security/advisories/GHSA-h3m8-53j3-xjx8nvdVendor Advisory
github.com/chamilo/chamilo-lms/releases/tag/v1.11.30nvdProductRelease Notes

News mentions

No linked articles in our index yet.

Severity

MediumCVSS v3.1

6.1/ 10

CVSS v45.1

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack vector: Network
Complexity: Low
Privileges: None
User interaction: Required
Scope: Changed
Confidentiality: Low
Integrity: Low
Availability: None

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS

Probability of exploitation in the next 30 days.

0.16%

VYPR risk score

Composite of severity, exploitation, and reach.

0.40medium

cvss	0.397
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000

Weaknesses

CWE-79
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-80
Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
CWE-87
Improper Neutralization of Alternate XSS Syntax

CVE ID

CVE-2025-52563