Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-42030— MapServer: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) in OpenLayers viewer

Quick assessment

Affected
MapServer MapServer
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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。

CVSS 6.1 · Medium EPSS 0.25% · P16

Affected Version Matrix 1

VendorProduct Version RangeStatus
MapServer MapServer >= 6.0, < 8.6.2 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-42030

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
MapServer: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) in OpenLayers viewer
Source: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
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: CVE Program / CVE List V5
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

Vendor Product Affected Versions CPE Subscribe
MapServer MapServer >= 6.0, < 8.6.2 -

II. Public POCs for CVE-2026-42030

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-42030

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-42030 (1)

Vendor Pages for CVE-2026-42030 (1)

IV. Related Vulnerabilities

Same product: MapServer
Same vendor: MapServer
Same weakness: CWE-80

V. Comments for CVE-2026-42030

No comments yet

Leave a comment