CVE-2026-42140 MEDIUM

CVE-2026-42140: Server-Side Request Forgery (SSRF) in PlantUML Macro via 'server' parameter

Vendor Xwiki-Contrib
Product macro-plantuml
Weakness CWE-918 · SSRF
Published May 4, 2026
Last update May 4, 2026
View on NVD All CVEs

CVSS base score

4.4/10
Attack vector Network
Attack complexity High
Privileges required Low
User interaction Required
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

May 4, 2026 CVE published
May 4, 2026 Record updated