# CVE-2026-45144: Chamilo LMS: Stored XSS in public user-profile fields

Status: published. Published: 2026-10-30. Updated: 2026-11-04.

Chamilo LMS is an open-source learning management system. From 2.0.0 until 2.0.1, `GET /user/{username}` is anonymously reachable and renders six user-editable profile fields (`firstname`, `lastname`, `competences`, `openarea`, `teach`, and `diplomas`) inside `{% autoescape false %}`, without server-side sanitization on the write path. A ROLE_STUDENT attacker can plant HTML in their own profile; self-registration, when enabled, lets an otherwise anonymous attacker obtain that role. The stored content executes in the browser of any visitor, including administrators, who follows the public profile link, potentially allowing account takeover through session, JWT, or `localStorage` exfiltration. This issue is fixed in version 2.0.1.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- chamilo / chamilo-lms: >= 2.0.0, < 2.0.1 (affected). Source: CNA: GitHub_M

## Severity and prioritization

- CVSS 3.1: 8.9 (high); CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L; source: CNA: GitHub_M

- CVSS 3.1: 8.9 (high); CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L; source: NVD: security-advisories@github.com

- CISA KEV: No listing in collected sources

- EPSS: 0.23% as of 2026-11-04; percentile 13.79%

- SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-79

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-9833-c7cj-x9xm (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/chamilo/chamilo-lms/commit/0ba260a851ef48506814baa7a20534c8f0c35057 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/chamilo/chamilo-lms/releases/tag/v2.0.1 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/chamilo/chamilo-lms/commit/0ba260a851ef48506814baa7a20534c8f0c35057 (security-advisories@github.com)

- https://github.com/chamilo/chamilo-lms/releases/tag/v2.0.1 (security-advisories@github.com)

- https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-9833-c7cj-x9xm (security-advisories@github.com)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-45144; retrieved 2026-11-04; source updated 2026-11-04

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-45144; retrieved 2026-11-05; source updated 2026-11-04

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-45144; retrieved 2026-11-04; source updated Not reported

Revision: bc04aae07767c52e904bdd0f65917878ca6db62de30dd011c5f5d08a6dcfc07e

Canonical: https://y2.dev/cve/CVE-2026-45144

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