xwiki-contrib syntax-markdown up to 8.8 cross site scripting

Summaryinfo

A vulnerability identified as problematic has been detected in xwiki-contrib syntax-markdown up to 8.8. Impacted is an unknown function. The manipulation leads to cross site scripting. This vulnerability is uniquely identified as CVE-2025-46558. The attack is possible to be carried out remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in xwiki-contrib syntax-markdown up to 8.8 and classified as problematic. This issue affects some unknown functionality. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to 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. Impacted is integrity. The summary by CVE is:

XWiki Contrib's Syntax Markdown allows importing Markdown content into wiki pages and creating wiki content in Markdown. In versions starting from 8.2 to before 8.9, the Markdown syntax is vulnerable to cross-site scripting (XSS) through HTML. In particular, using Markdown syntax, it's possible for any user to embed Javascript code that will then be executed on the browser of any other user visiting either the document or the comment that contains it. In the instance that this code is executed by a user with admins or programming rights, this issue compromises the confidentiality, integrity and availability of the whole XWiki installation. This issue has been patched in version 8.9.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2025-46558 since 04/24/2025. The exploitation is known to be easy. The attack may be initiated remotely. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Upgrading to version 8.9 eliminates this vulnerability.

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Productinfo

Type

• Content Management System

Vendor

• xwiki-contrib

Name

• syntax-markdown

Version

• 8.0
• 8.1
• 8.2
• 8.3
• 8.4
• 8.5
• 8.6
• 8.7
• 8.8

Website

• Product: https://github.com/xwiki-contrib/syntax-markdown/

CPE 2.3info

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CPE 2.2info

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