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.
Published: 2026-05-08
Score: 6.1 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Thu, 14 May 2026 18:15:00 +0000

Type Values Removed Values Added
First Time appeared Osgeo
Osgeo mapserver
CPEs cpe:2.3:a:osgeo:mapserver:*:*:*:*:*:*:*:*
Vendors & Products Osgeo
Osgeo mapserver

Fri, 08 May 2026 23:00:00 +0000

Type Values Removed Values Added
First Time appeared Mapserver
Mapserver mapserver
Vendors & Products Mapserver
Mapserver mapserver

Fri, 08 May 2026 22:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 08 May 2026 16:30:00 +0000

Type Values Removed Values Added
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.
Title MapServer: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) in OpenLayers viewer
Weaknesses CWE-80
References
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}


Subscriptions

Mapserver Mapserver
Osgeo Mapserver
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-05-08T21:26:45.294Z

Reserved: 2026-04-23T16:05:01.708Z

Link: CVE-2026-42030

cve-icon Vulnrichment

Updated: 2026-05-08T17:12:13.321Z

cve-icon NVD

Status : Analyzed

Published: 2026-05-08T17:16:31.307

Modified: 2026-05-14T18:04:33.627

Link: CVE-2026-42030

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-08T22:45:05Z

Weaknesses