{"id":"CVE-2026-21663","details":"HackerOne community member Patrick Lang (7yr) has reported a reflected XSS vulnerability in the banner-acl.php script of Revive Adserver. An attacker can craft a specific URL that includes an HTML payload in a parameter. If a logged in administrator visits the URL, the HTML is sent to the browser and malicious scripts would be executed.","modified":"2026-07-17T03:46:00.967075845Z","published":"2026-01-20T20:48:47.974Z","database_specific":{"cna_assigner":"hackerone","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/21xxx/CVE-2026-21663.json","unresolved_ranges":[{"extracted_events":[{"introduced":"6"},{"last_affected":"6.0.4"}],"source":"AFFECTED_FIELD"}]},"references":[{"type":"WEB","url":"https://hackerone.com/reports/3473696"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/21xxx/CVE-2026-21663.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-21663"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/revive-adserver/revive-adserver","events":[{"introduced":"d30dee449a2da3d687c66fc4c162ed0b3e39482c"},{"last_affected":"37592f9d564b248f86b8230f5bdd53bbaa852f9e"}],"database_specific":{"source":"CPE_RANGE","cpe":"cpe:2.3:a:aquaplatform:revive_adserver:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"6.0.0"},{"last_affected":"6.0.4"}]}}],"versions":["v6.0.4","v6.0.3","v6.0.2","v6.0.1","v6.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-21663.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"}]}