CVE-2026-39878 | Chamilo LMS versions 1.11.38 and earlier contain a stored cr… | CVSS 9.3 CRITICAL

Description

Chamilo LMS versions 1.11.38 and earlier contain a stored cross-site scripting vulnerability in the user registration form that allows any unauthenticated attacker to execute arbitrary JavaScript in an administrator's browser session, leading to full platform admin account takeover. This has been patched in 1.11.40.

Metadata

CVE ID: CVE-2026-39878
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-04-07 20:32 UTC
Published: 2026-07-20 17:08 UTC
Last updated: 2026-07-20 18:54 UTC
Primary CWE: CWE-79
CWE-79: Improper Neutralization of Input During Web Page Gen…
Vendor / Product: chamilo / chamilo-lms
Sources: cve.org · NVD

Severity & Metrics

9.3 CRITICAL CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
chamilo	chamilo-lms	—	<= 1.11.38

Weakness (CWE)

CWE	Source	Description
CWE-79	cna	CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSS scores (1)

Score	Severity	Version	Source	Vector
9.3	CRITICAL	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

References (1)

https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-gcjp-f7jm-rrrg https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-gcjp-f7jm-rrrg