XSS in Xwiki
CVE-2025-46558
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.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.004 (34.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H.
Affected products
- Xwiki
- Xwiki-contrib Syntax-markdown — versions >= 8.2, < 8.9
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM, Patch, Third Party Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Exploit, x_refsource_MISC, Issue Tracking)
Frequently asked questions
- What is CVE-2025-46558?
- CVE-2025-46558 is a critical-severity vulnerability in Xwiki, classified under Cross-site Scripting. CVSS score: 9.0/10. Published 2025-04-30.
- How severe is CVE-2025-46558?
- Critical severity. CVSS v3 base score is 9.0 out of 10.
- Is CVE-2025-46558 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.