Chamilo LMS up to 2.0.0 Message MessageShow.vue cross site scripting

Summaryinfo

A vulnerability marked as problematic has been reported in Chamilo LMS up to 2.0.0. This vulnerability affects unknown code of the file assets/vue/views/message/MessageShow.vue of the component Message Handler. This manipulation causes cross site scripting. This vulnerability is tracked as CVE-2026-45143. The attack is possible to be carried out remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Chamilo LMS up to 2.0.0 and classified as problematic. Affected by this vulnerability is an unknown code of the file assets/vue/views/message/MessageShow.vue of the component Message Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-45143 since 05/08/2026. The exploitation appears to be easy. The attack can be launched remotely. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Upgrading to version 2.0.1 eliminates this vulnerability.

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Productinfo

Type

• Content Management System

Vendor

• Chamilo

Name

• LMS

Version

• 2.0

License

• open-source

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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