CVE-2026-42030
published 2026-05-08CVE-2026-42030: 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…
PriorityP429medium6.1CVSS 3.1
AVNACLPRNUIRSCCLILAN
EPSS
0.25%
15.8th percentile
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.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mapserver | mapserver | — | — |
| osgeo | mapserver | >= 6.0.0 < 8.6.2 | 8.6.2 |
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-42030 mapserver: MapServer: Reflected Cross-Site Scripting (XSS) via unsanitized WMS parameter [fedora-all]
bugzilla·2026-05-15·CVSS 6.1
CVE-2026-42030 [MEDIUM] CVE-2026-42030 mapserver: MapServer: Reflected Cross-Site Scripting (XSS) via unsanitized WMS parameter [fedora-all]
CVE-2026-42030 mapserver: MapServer: Reflected Cross-Site Scripting (XSS) via unsanitized WMS parameter [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Bugzilla
CVE-2026-42030 MapServer: OpenLayers: MapServer: Reflected Cross-Site Scripting (XSS) via unsanitized WMS parameter
bugzilla·2026-05-08·CVSS 6.1
CVE-2026-42030 [MEDIUM] CVE-2026-42030 MapServer: OpenLayers: MapServer: Reflected Cross-Site Scripting (XSS) via unsanitized WMS parameter
CVE-2026-42030 MapServer: OpenLayers: MapServer: Reflected Cross-Site Scripting (XSS) via unsanitized WMS parameter
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.
2026-05-08
Published