CVE-2025-59431: OSGeo Mapserver

Critical severity, CVSS 9.8. EPSS: 0.4% chance of exploitation in the next 30 days.

MapServer is a system for developing web-based GIS applications. Prior to 8.4.1, the XML Filter Query directive PropertyName is vulnerably to Boolean-based SQL injection. It seems like expression checking is bypassed by introducing double quote characters in the PropertyName. Allowing to manipulate backend database queries. This vulnerability is fixed in 8.4.1.

Affected products

• OSGeo Mapserver: version 8.4.0 only

Published 2025-09-19. Last modified 2026-06-17.