{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-42030", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-04-23T16:05:01.708Z", "datePublished": "2026-05-08T15:56:48.553Z", "dateUpdated": "2026-05-08T21:26:45.294Z"}, "containers": {"cna": {"title": "MapServer: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) in OpenLayers viewer", "problemTypes": [{"descriptions": [{"cweId": "CWE-80", "lang": "en", "description": "CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/MapServer/MapServer/security/advisories/GHSA-4g9f-ph64-hg2x", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/MapServer/MapServer/security/advisories/GHSA-4g9f-ph64-hg2x"}, {"name": "https://github.com/MapServer/MapServer/releases/tag/rel-8-6-2", "tags": ["x_refsource_MISC"], "url": "https://github.com/MapServer/MapServer/releases/tag/rel-8-6-2"}], "affected": [{"vendor": "MapServer", "product": "MapServer", "versions": [{"version": ">= 6.0, < 8.6.2", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-08T15:56:48.553Z"}, "descriptions": [{"lang": "en", "value": "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": {"advisory": "GHSA-4g9f-ph64-hg2x", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/MapServer/MapServer/security/advisories/GHSA-4g9f-ph64-hg2x", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-05-08T17:12:03.204167Z", "id": "CVE-2026-42030", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-08T21:26:45.294Z"}}]}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-42030", "lastModified": "2026-05-08T17:16:31.307", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.7, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-05-08T17:16:31.307", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/MapServer/MapServer/releases/tag/rel-8-6-2"}, {"source": "security-advisories@github.com", "url": "https://github.com/MapServer/MapServer/security/advisories/GHSA-4g9f-ph64-hg2x"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-80"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"created": "2026-05-08T19:15:14.825304+00:00", "updated": "2026-05-08T19:15:14.825328+00:00", "vendors": []}