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TI-2026-30471 Aliases CVE-2026-42140GHSA-42fc-7w97-8vrc

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

Priority LOW 20CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00179 7th percentileScored 2026-11-07
Fix Fixed macro-plantuml (xwiki-contrib): 2.4.1org.xwiki.contrib.plantuml:macro-plantuml-macro (Maven): 2.4.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
XWikimacro-plantumlbefore 2.4.12.4.1Patch availableCNA
—org.xwiki.contrib.plantuml:macro-plantuml-macro (Maven)before 2.4.12.4.1Patch availableGHSA-42fc-7w97-8vrc
  • macro-plantuml VendorXWiki Affected before 2.4.1 Fixed in 2.4.1 Patch available CNA
  • org.xwiki.contrib.plantuml:macro-plantuml-macro (Maven) Vendor— Affected before 2.4.1 Fixed in 2.4.1 Patch available GHSA-42fc-7w97-8vrc

Remediation

  • Fix · CNA macro-plantuml (xwiki-contrib) Fixed in 2.4.1
  • Fix · GHSA-42fc-7w97-8vrc org.xwiki.contrib.plantuml:macro-plantuml-macro (Maven) Fixed in 2.4.1 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-42140
  2. 2026-10-03 Alias added: GHSA-42fc-7w97-8vrc

References

Advisory 1

Other 4

  • TI-2025-18595 Remote code execution as guest via SolrSearchMacros request in xwiki KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-25214 Remote code execution through the section parameter in Administration as guest in XWiki Platform CVSS 3.1CRITICAL 10.0
  • TI-2025-23500 XWiki Platform vulnerable to SQL injection through getdeleteddocuments.vm template sort parameter CVSS 4.0CRITICAL 9.3
  • TI-2025-23979 org.xwiki.platform:xwiki-platform-rest-server allows SQL injection in query endpoint of REST API CVSS 4.0CRITICAL 9.3
  • TI-2024-20829 XWiki Platform: Remote code execution from account via SearchSuggestSourceSheet CVSS 3.1CRITICAL 10.0
  • TI-2024-14375 XWiki Remote Code Execution vulnerability via user registration CVSS 3.1CRITICAL 10.0
See all 304 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences