{"id":"DEBIAN-CVE-2021-3639","details":"A flaw was found in mod_auth_mellon where it does not sanitize logout URLs properly. This issue could be used by an attacker to facilitate phishing attacks by tricking users into visiting a trusted web application URL that redirects to an external and potentially malicious server. The highest threat from this liability is to confidentiality and integrity.","modified":"2026-09-01T20:04:30.978523739Z","published":"2022-08-22T15:15:13.633Z","upstream":["CVE-2021-3639"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2021-3639"}],"affected":[{"package":{"name":"libapache2-mod-auth-mellon","ecosystem":"Debian:12","purl":"pkg:deb/debian/libapache2-mod-auth-mellon?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.18.0-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-3639.json"}},{"package":{"name":"libapache2-mod-auth-mellon","ecosystem":"Debian:13","purl":"pkg:deb/debian/libapache2-mod-auth-mellon?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.18.0-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-3639.json"}},{"package":{"name":"libapache2-mod-auth-mellon","ecosystem":"Debian:14","purl":"pkg:deb/debian/libapache2-mod-auth-mellon?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.18.0-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-3639.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"}]}