CVE-2026-42030 — MapServer'S WMS Server Cross-Site Scripting (XSS)
CVE-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 server allows an unauthenticated attacker to inject arbitrary HTML/JavaScript into the browser of any user who opens a crafted
What This Means For You
- If your environment is affected by CWE-80, review your exposure and prioritize patching based on your environment. Monitor vendor advisories for CVE-2026-42030 updates and patches.
Related ATT&CK Techniques
🛡️ Detection Rules
3 rules · 6 SIEM formats3 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
CVE-2026-42030 - MapServer WMS XSS Exploit Attempt
title: CVE-2026-42030 - MapServer WMS XSS Exploit Attempt
id: scw-2026-05-08-ai-1
status: experimental
level: high
description: |
Detects attempts to exploit CVE-2026-42030 by looking for WMS requests containing 'FORMAT=application/openlayers' and 'SRS=' along with a JavaScript '<script>' tag in the query string. This specific combination targets the reflected XSS vulnerability in MapServer's WMS server.
author: SCW Feed Engine (AI-generated)
date: 2026-05-08
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-42030/
tags:
- attack.initial_access
- attack.t1190
logsource:
category: webserver
detection:
selection:
cs-uri-query|contains:
- 'FORMAT=application/openlayers'
cs-uri-query|contains:
- 'SRS='
cs-uri-query|contains:
- '<script>'
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-42030 | vulnerability | CVE-2026-42030 |
| CWE-80 | weakness | CWE-80 |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | May 08, 2026 at 20:16 UTC |
This content was curated and summarized by Shimi's Cyber World for informational purposes. It is not copied or republished in full. All intellectual property rights remain with the original author and source.
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