CVE-2026-42140

MEDIUM EPSS 4.7%
Published May 4, 20262mo ago · Modified Jun 17, 20262w ago
4.4 CVSS 3.1
Medium
Find Similar
Published May 4, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
4.4
Exploitability
1.3
Impact
2.7
Vector string
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack Vector Network
Attack Complexity High
Privileges Required Low
User Interaction Required
Scope Changed
Confidentiality Low
Integrity Low
Availability None

Threat Intelligence

EPSS Exploit Probability
4.7% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-918 Server-Side Request Forgery (SSRF) Validation

References 3

  • github.com https://github.com/xwiki-contrib/macro-plantuml/commit/c8b19bda93058794e04c8862fc7ca85c59b5fe5c
  • github.com https://github.com/xwiki-contrib/macro-plantuml/security/advisories/GHSA-42fc-7w97-8vrc
  • jira.xwiki.org https://jira.xwiki.org/browse/PLANTUML-25

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.