CVE-2026-42140
MEDIUMServer-Side Request Forgery (SSRF) in PlantUML Macro via 'server' parameter
Title source: cnaDescription
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.
References (3)
Core 3
Core References
X_Refsource_Misc x_refsource_misc
https://github.com/xwiki-contrib/macro-plantuml/commit/c8b19bda93058794e04c8862fc7ca85c59b5fe5c
X_Refsource_Misc x_refsource_misc
https://jira.xwiki.org/browse/PLANTUML-25
X_Refsource_Confirm x_refsource_confirm
https://github.com/xwiki-contrib/macro-plantuml/security/advisories/GHSA-42fc-7w97-8vrc
Scores
CVSS v3
4.4
EPSS
0.0003
EPSS Percentile
6.9%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-918
Status
published
Products (2)
org.xwiki.contrib.plantuml/macro-plantuml-macro
0 - 2.4.1Maven
xwiki-contrib/macro-plantuml
< 2.4.1
Published
May 04, 2026
Tracked Since
May 04, 2026