{"id":"DEBIAN-CVE-2026-42030","details":"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.","modified":"2026-10-01T03:03:11.875482827Z","published":"2026-05-08T17:16:31.307Z","upstream":["CVE-2026-42030"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-42030"}],"affected":[{"package":{"name":"mapserver","ecosystem":"Debian:12","purl":"pkg:deb/debian/mapserver?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.0.0-3","8.0.0-3+deb12u1","8.0.1-1","8.0.1-1~exp1","8.0.1-2","8.0.1-2.1~exp1","8.0.1-2~bpo12+1","8.0.1-3","8.0.1-3~exp1","8.0.1-4","8.0.1-5","8.0.2-1","8.0.2-1~bpo12+1","8.2.0-1","8.2.0-1~bpo12+1","8.2.0~beta1-1~exp1","8.2.0~beta2-1~exp1","8.2.0~beta3-1~exp1","8.2.0~rc1-1~exp1","8.2.0~rc2-1~exp1","8.2.0~rc3-1~exp1","8.2.1-1","8.2.1-1~bpo12+1","8.2.2-1","8.2.2-1~bpo12+1","8.4.0-1","8.4.0-1~bpo12+1","8.4.0-2","8.4.0-3","8.4.0-4","8.4.0~beta1-1~exp1","8.4.0~beta2-1~exp1","8.4.0~rc1-1~exp1","8.4.1-1","8.4.1-1~bpo13+1","8.4.1-2","8.6.0-1","8.6.0-1~bpo13+1","8.6.0~beta1-1~exp1","8.6.0~beta2-1~exp1","8.6.0~rc1-1~exp1","8.6.1-1","8.6.1-1~bpo13+1","8.6.2-1","8.6.2-1~bpo13+1","8.6.3-1","8.6.3-1~bpo13+1","8.6.4-1","8.6.4-1~bpo13+1","8.6.5-1","8.6.5-1~bpo13+1","8.6.6-1","8.6.6-1~bpo13+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42030.json"}},{"package":{"name":"mapserver","ecosystem":"Debian:13","purl":"pkg:deb/debian/mapserver?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.4.0-4","8.4.0-4+deb13u1","8.4.0-4+deb13u2","8.4.1-1","8.4.1-1~bpo13+1","8.4.1-2","8.6.0-1","8.6.0-1~bpo13+1","8.6.0~beta1-1~exp1","8.6.0~beta2-1~exp1","8.6.0~rc1-1~exp1","8.6.1-1","8.6.1-1~bpo13+1","8.6.2-1","8.6.2-1~bpo13+1","8.6.3-1","8.6.3-1~bpo13+1","8.6.4-1","8.6.4-1~bpo13+1","8.6.5-1","8.6.5-1~bpo13+1","8.6.6-1","8.6.6-1~bpo13+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42030.json"}},{"package":{"name":"mapserver","ecosystem":"Debian:14","purl":"pkg:deb/debian/mapserver?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.6.2-1"}]}],"versions":["8.4.0-4","8.4.1-1","8.4.1-1~bpo13+1","8.4.1-2","8.6.0-1","8.6.0-1~bpo13+1","8.6.0~beta1-1~exp1","8.6.0~beta2-1~exp1","8.6.0~rc1-1~exp1","8.6.1-1","8.6.1-1~bpo13+1","8.6.2-1~bpo13+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42030.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"}]}