CVE-2026-42140CWE-918

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

Medium · published May 4, 2026

CVSS v3.1
4.4
EPSS
0%
Percentile
18.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00274 · 18.8th percentile
Weakness
CWE-918 · Server-Side Request Forgery (SSRF)
Published
2026-05-04T17:37Z
EPSS history
Timeline
  • 04 MAY 17:37Z
    Server-Side Request Forgery (SSRF) in PlantUML Macro via 'server' parameter
    cvelistv5