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CVE Vulnerability Details :
CVE-2026-42030
PUBLISHED
More InfoOfficial Page
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
View Known Exploited Vulnerability (KEV) details
Published At-08 May, 2026 | 15:56
Updated At-08 May, 2026 | 21:26
Rejected At-
▼CVE Numbering Authority (CNA)
MapServer: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) in OpenLayers viewer

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 Products
Vendor
MapServer
Product
MapServer
Versions
Affected
  • >= 6.0, < 8.6.2
Problem Types
TypeCWE IDDescription
CWECWE-80CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
Type: CWE
CWE ID: CWE-80
Description: CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
Metrics
VersionBase scoreBase severityVector
3.16.1MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Version: 3.1
Base score: 6.1
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/MapServer/MapServer/security/advisories/GHSA-4g9f-ph64-hg2x
x_refsource_CONFIRM
https://github.com/MapServer/MapServer/releases/tag/rel-8-6-2
x_refsource_MISC
Hyperlink: https://github.com/MapServer/MapServer/security/advisories/GHSA-4g9f-ph64-hg2x
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/MapServer/MapServer/releases/tag/rel-8-6-2
Resource:
x_refsource_MISC
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/MapServer/MapServer/security/advisories/GHSA-4g9f-ph64-hg2x
exploit
Hyperlink: https://github.com/MapServer/MapServer/security/advisories/GHSA-4g9f-ph64-hg2x
Resource:
exploit
Details not found