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OpenAdvisories
Medium · 4.4 CVE-2026-42140 EUVD-2026-27073GHSA-42fc-7w97-8vrc

Server-Side Request Forgery (SSRF) in PlantUML Macro via 'server' parameter

Published May 4, 2026 · Updated May 4, 2026 · Assigned by GitHub_M

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.

Affected products

VendorProductAffectedFixed
xwiki-contrib macro-plantuml < 2.4.1 —

Affected packages

EcosystemPackageAffectedFixedRecord
Maven org.xwiki.contrib.plantuml:macro-plantuml-macro < 2.4.1 2.4.1 GHSA-42fc-7w97-8vrc

References