CVE-2026-42030— MapServer: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) in OpenLayers viewer
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I. Basic Information for CVE-2026-42030
Vulnerability Information
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Vulnerability Title
MapServer: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) in OpenLayers viewer
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
Web页面中脚本相关HTML标签转义处理不恰当(基本跨站脚本)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Mapserver 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mapserver是开源地理空间（Osgeo）基金会的一套用于将空间数据和交互式地图应用程序发布到Web的开源平台。 MapServer 6.0版本至8.6.2之前版本存在安全漏洞，该漏洞源于WMS服务器中FORMAT=application/openlayers与未清理的SRS参数结合，可能导致反射型跨站脚本攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-42030
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- Release MapServer 8.6.2 · MapServer/MapServer · GitHubx_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2026-42030
IV. Related Vulnerabilities
Same weakness: CWE-80
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V. Comments for CVE-2026-42030
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