CVE-2025-46558: Syntax markdown commonmark12 Cross-Site Scripting Vulnerability
CRITICALCVE-2025-46558 is a CRITICAL (CVSS 9.0) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Syntax markdown commonmark12 libraries in the Maven ecosystem. The issue involves syntax-markdown-commonmark12 vulnerable to xss via markdown content. Remediation is available by upgrading affected packages to version 8.9.
CVE-2025-46558 at a Glance
Security Impact
CVSS: 9.0
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H).
How to Fix CVE-2025-46558
To remediate this vulnerability, upgrade all affected Syntax markdown commonmark12 dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
<dependency>
<groupId>org.xwiki.contrib.markdown</groupId>
<artifactId>syntax-markdown-commonmark12</artifactId>
<version>8.9</version>
</dependency>Run the following command in your project directory to verify that all resolved dependencies use the patched release:
mvn dependency:tree -Dincludes=org.xwiki.contrib.markdownHow to Check if You Are Affected
To determine whether your Java application is affected by CVE-2025-46558, inspect your build dependencies using the Maven Dependency Plugin:
mvn dependency:tree -Dincludes=org.xwiki.contrib.markdownAnalyze the terminal output to locate any version of Syntax markdown commonmark12 in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 8.9), your application is affected.
Note: The mvn dependency:tree -Dincludes=org.xwiki.contrib.markdown command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where 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. In Syntax markdown commonmark12, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2025-46558 Affected Syntax markdown commonmark12 Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
org.xwiki.contrib.markdown:syntax-markdown-commonmark12
|
Maven |
≥ 8.2
< 8.9
|
8.9
|
References
Frequently Asked Questions
What is CVE-2025-46558?
Which Syntax markdown commonmark12 versions are affected?
What version fixes CVE-2025-46558?
Is syntax-markdown-commonmark12 affected?
What is the CVSS score of CVE-2025-46558?
What CWE is associated with CVE-2025-46558?
How can I check Maven dependencies for CVE-2025-46558?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-8g2j-rhfh-hq3r",
"modified" : "2025-05-01T13:30:39Z",
"published" : "2025-04-30T16:53:27Z",
"aliases" : [ "CVE-2025-46558" ],
"summary" : "org.xwiki.contrib.markdown:syntax-markdown-commonmark12 vulnerable to XSS via Markdown content",
"details" : "### Impact\nThe 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.\n\nTo 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.\n\n### Patches\nThis has been patched in version 8.9 of the CommonMark Markdown Syntax 1.2 extension.\n\n### Workarounds\nWe're not aware of any workaround except upgrading.\n\n### References\n* https://jira.xwiki.org/browse/MARKDOWN-80\n* https://github.com/xwiki-contrib/syntax-markdown/commit/d136472d6e8a47981a0ede420a9096f88ffa5035",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Maven",
"name" : "org.xwiki.contrib.markdown:syntax-markdown-commonmark12"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "8.2"
}, {
"fixed" : "8.9"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/xwiki-contrib/syntax-markdown/security/advisories/GHSA-8g2j-rhfh-hq3r"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-46558"
}, {
"type" : "WEB",
"url" : "https://github.com/xwiki-contrib/syntax-markdown/commit/d136472d6e8a47981a0ede420a9096f88ffa5035"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/xwiki-contrib/syntax-markdown"
}, {
"type" : "WEB",
"url" : "https://jira.xwiki.org/browse/MARKDOWN-80"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-79" ],
"severity" : "CRITICAL",
"github_reviewed" : true,
"github_reviewed_at" : "2025-04-30T16:53:27Z",
"nvd_published_at" : "2025-04-30T19:15:55Z"
}
}