Security Advisory

CVE-2026-42030

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-05-08 15:56:48

Last updated 2026-05-08 21:26:45

Assigner GitHub_M

CVSS score 6.1

State PUBLISHED

Description

MapServer is a system for developing web-based GIS applications. From version 6.0 to before version 8.6.2, a reflected XSS vulnerability in MapServer's WMS server allows an unauthenticated attacker to inject arbitrary HTML/JavaScript into the browser of any user who opens a crafted WMS URL. The vulnerability is triggered via FORMAT=application/openlayers combined with an unsanitized SRS parameter in WMS 1.3.0 requests. This issue has been patched in version 8.6.2.

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