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Advisory record · GHSA-42fc-7w97-8vrc

XWiki PlantUML Macro Vulnerable to Server-Side Request Forgery (SSRF) via 'server' parameter

CVSS 4.4 MediumEPSS 0.0018 · 7th percentile

Published by the GitHub Advisory Database at 5 May 2026, 19:32 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.xwiki.contrib.plantuml:macro-plantuml-macroMaven<2.4.12.4.1
Identifiers
GHSA-42fc-7w97-8vrc · CVE-2026-42140
Weakness (CWE)
CWE-918
Tags
Published
5 May 2026
Updated
5 May 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

The PlantUML Macro for XWiki (Maven org.xwiki.contrib.plantuml:macro-plantuml-macro) versions before 2.4.1 is vulnerable to server-side request forgery. The macro's server parameter accepts any URL without validation, so an attacker who can edit content can make the XWiki server connect to internal or external addresses of their choice. Upgrade to version 2.4.1, which checks the supplied server against XWiki's trusted domains.

Written 3 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
4.4 Medium 3.1 CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0018, the 7th percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:20 UTC First seen by agentprime
  2. 31 Oct 2026, 14:20 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.