What’s Vulnerable › Vulnerabilities

CVE-2026-45143: Chamilo LMS: Student-to-admin stored XSS in private messages via v-html

• Severity: critical (CVSS 9.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-17 · updated 2026-09-29
• Weakness: CWE-79

Description

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 products

• chamilo-lms: from 2.0.0, < 2.0.1

References

• https://github.com/chamilo/chamilo-lms/commit/b2c91c021fc5ab7e91feb4927c4c676f77034ac5
• https://github.com/chamilo/chamilo-lms/releases/tag/v2.0.1
• https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-x88v-rg6r-vqq6

Get alerted when CVE-2026-45143 or the next vulnerability affects your stack