by Kastro
Paper/Archive/CVE-2026-45143

CVE-2026-45143

chamilo chamilo-lms — Chamilo LMS: Student-to-admin stored XSS in private messages via v-html

EPSS 0.5%CVSS 9.0
critical.is priorityof 100
35
CVSS 9.0 (CNA)9.0 / 10 × 3027.0Not in CISA KEV+300.0EPSS percentile 42.1.421 × 208.4No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
chamilo-lms>= 2.0.0, < 2.0.1–CNA

Scores by source

GitHub_M (CNA)9.0CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refgithub.com/chamilo/chamilo-lms/security/advisories/GHSA-x88v-rg6r-vqq6refgithub.com/chamilo/chamilo-lms/commit/b2c91c021fc5ab7e91feb4927c4c676f77034ac5refgithub.com/chamilo/chamilo-lms/releases/tag/v2.0.1