Cross-Site Scripting (XSS) in Chamilo LMS (CVE-2026-45143)
Summary
Cross-site scripting in Chamilo LMS (CVE-2026-45143). Successful exploitation can lead to full system takeover. Mitigation: upgrade to 2.0.1 or later.
Original description
The description as published by the source.
Chamilo LMS is an open-source learning management system. From 2.0.0 through at least 2.1.0, Chamilo LMS stores private Message.content without server-side sanitization and renders it as HTML in assets/vue/views/message/MessageShow.vue and public/main/template/default/message/view_message.html.twig. An authenticated low-privilege user, including a student, can directly address crafted message content to an administrator because the message creation flow permits a sender to select another user as the recipient. The content executes in the recipient's browser when the recipient opens the routine inbox or message view, without requiring a link click, and can expose session credentials or permit actions as the administrator. This vulnerability is fixed in 2.0.1.
Source: NIST National Vulnerability Database NVD
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-45143 has been found in Chamilo LMS.
Successful exploitation can lead to full system takeover. CVSS score: 9.0/10.
What to do: upgrade Chamilo LMS to 2.0.1 or later.
If unsure, ask your IT team or search "Chamilo LMS CVE-2026-45143" on the vendor's site.
CVE-2026-45143 (Chamilo LMS) — CWE-79 / CVSS v3 9.0
Attack vector: remote (network-reachable)
Patched: 2.0.1 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
Cross-site scripting (XSS) (CWE-79) exists in Chamilo LMS.
Check the vendor advisory for the affected versions of Chamilo LMS.
Severity: Critical (CVSS 9.0/10). Successful exploitation can lead to full system takeover.
Update to 2.0.1.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで Chamilo LMS を使っているサービスとバージョンを洗い出す。
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2Apply patch patch
Upgrade Chamilo LMS to 2.0.1ステージング環境で 2.0.1 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
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3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。