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NVD Vulnerability Details :
CVE-2026-42030
Analyzed
More InfoOfficial Page
Source-security-advisories@github.com
View Known Exploited Vulnerability (KEV) details
Published At-08 May, 2026 | 17:16
Updated At-14 May, 2026 | 18:04

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.16.1MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Type: Secondary
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
CPE Matches
osgeo
osgeo
>>mapserver>>Versions from 6.0.0(inclusive) to 8.6.2(exclusive)
cpe:2.3:a:osgeo:mapserver:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-80Secondarysecurity-advisories@github.com
CWE ID: CWE-80
Type: Secondary
Source: security-advisories@github.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/MapServer/MapServer/releases/tag/rel-8-6-2security-advisories@github.com
Product
Release Notes
https://github.com/MapServer/MapServer/security/advisories/GHSA-4g9f-ph64-hg2xsecurity-advisories@github.com
Exploit
Vendor Advisory
https://github.com/MapServer/MapServer/security/advisories/GHSA-4g9f-ph64-hg2x134c704f-9b21-4f2e-91b3-4a467353bcc0
Exploit
Vendor Advisory
Hyperlink: https://github.com/MapServer/MapServer/releases/tag/rel-8-6-2
Source: security-advisories@github.com
Resource:
Product
Release Notes
Hyperlink: https://github.com/MapServer/MapServer/security/advisories/GHSA-4g9f-ph64-hg2x
Source: security-advisories@github.com
Resource:
Exploit
Vendor Advisory
Hyperlink: https://github.com/MapServer/MapServer/security/advisories/GHSA-4g9f-ph64-hg2x
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Resource:
Exploit
Vendor Advisory
Change History
0Changes found
Details not found