CVE-2025-46558: org.xwiki.contrib.markdown:syntax-markdown-commonmark12 vulnerable to XSS via Markdown content
Description
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.
Classification
CVE ID: CVE-2025-46558
CVSS Base Severity: CRITICAL
CVSS Base Score: 9.1
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Problem Types
CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Affected Products
Vendor: xwiki-contrib
Product: syntax-markdown
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.04% (probability of being exploited)
EPSS Percentile: 11.33% (scored less or equal to compared to others)
EPSS Date: 2025-05-29 (when was this score calculated)
References
https://nvd.nist.gov/vuln/detail/CVE-2025-46558https://github.com/xwiki-contrib/syntax-markdown/security/advisories/GHSA-8g2j-rhfh-hq3r
https://github.com/xwiki-contrib/syntax-markdown/commit/d136472d6e8a47981a0ede420a9096f88ffa5035
https://jira.xwiki.org/browse/MARKDOWN-80