Chamilo stored XSS via user registration leads to admin account takeover (CVE-2026-39878) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-39878

Chamilo stored XSS via user registration leads to admin account takeover

Answer in brief

CVE-2026-39878 records a Unknown severity vulnerability in Chamilo stored XSS via user registration leads to admin account takeover. The current sources do not mark it as known exploited. The current feed maps chamilo/chamilo-lms (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jul 20, 2026Updated Aug 21, 2026Source checked Aug 21, 2026First seen by HOL Aug 21, 2026Material review Aug 21, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps chamilo/chamilo-lms (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
chamilo/chamilo-lmsgeneric	<= 1.11.38	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for chamilo/chamilo-lms.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Jul 20, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 21, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 21, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.