CVE-2026-42140 — Server-Side Request Forgery (SSRF) in PlantUML Macro via 'server' parameter
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).…
Published: 2026-05-04 · CVSS: 4.4 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7