Description

PlantUML Macro is a macro for rendering UML diagrams from simple textual schemes. Prior to version 2.4.1, the PlantUML Macro is vulnerable to Server-Side Request Forgery (SSRF). The macro allows users to specify an alternative PlantUML server via the server parameter. However, the application does not validate the supplied URL. An attacker can supply an internal IP address or a malicious external URL. The XWiki server will attempt to connect to this URL to "render" the diagram. This issue has been patched in version 2.4.1.

INFO

Published Date :

2026-05-04T17:37:09.481Z

Last Modified :

2026-05-04T19:52:14.187Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-42140 vulnerability.

Vendors Products
Xwiki-contrib
  • Macro-plantuml
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-42140.

URL Resource
https://github.com/xwiki-contrib/macro-plantuml/commit/c8b19bda93058794e04c8862fc7ca85c59b5fe5c cve-icon cve-icon
https://github.com/xwiki-contrib/macro-plantuml/security/advisories/GHSA-42fc-7w97-8vrc cve-icon cve-icon
https://jira.xwiki.org/browse/PLANTUML-25 cve-icon cve-icon
Login to claim this CVE

CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact