CVE-2025-46558 – org.xwiki.contrib.markdown:syntax-markdown-commonmark12

Package

Manager: maven
Name: org.xwiki.contrib.markdown:syntax-markdown-commonmark12
Vulnerable Version: >=8.2 <8.9

Severity

Level: Critical

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

EPSS: 0.0133 pctl0.79183

Details

org.xwiki.contrib.markdown:syntax-markdown-commonmark12 vulnerable to XSS via Markdown content ### Impact The Markdown syntax is vulnerable to 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. To reproduce, on an instance where the CommonMark Markdown Syntax 1.2 extension is installed, log in as a user without script rights. Edit a document and set its syntax to Markdown. Then , add the content `<script>alert("XSS")</script>` and refresh the page. If an alert appears containing "XSS", then the instance is vulnerable. ### Patches This has been patched in version 8.9 of the CommonMark Markdown Syntax 1.2 extension. ### Workarounds We're not aware of any workaround except upgrading. ### References * https://jira.xwiki.org/browse/MARKDOWN-80 * https://github.com/xwiki-contrib/syntax-markdown/commit/d136472d6e8a47981a0ede420a9096f88ffa5035

Metadata

Created: 2025-04-30T16:53:27Z
Modified: 2025-05-01T13:30:39Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/04/GHSA-8g2j-rhfh-hq3r/GHSA-8g2j-rhfh-hq3r.json
CWE IDs: ["CWE-79"]
Alternative ID: GHSA-8g2j-rhfh-hq3r
Finding: F425
Auto approve: 1