{"id":"BIT-joomla-2020-8421","details":"An issue was discovered in Joomla! before 3.9.15. Inadequate escaping of usernames allows XSS attacks in com_actionlogs.","aliases":["CVE-2020-8421"],"modified":"2026-09-08T08:48:01.747755303Z","published":"2025-04-03T14:11:45.995Z","database_specific":{"cpes":["cpe:2.3:a:joomla:joomla!:*:*:*:*:*:*:*:*"],"severity":"Medium"},"references":[{"type":"ADVISORY","url":"https://developer.joomla.org/security-centre/800-20200103-core-xss-in-com-actionlogs"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-8421"}],"affected":[{"package":{"name":"joomla","ecosystem":"Bitnami","purl":"pkg:bitnami/joomla"},"ranges":[{"type":"SEMVER","events":[{"introduced":"3.9.0"},{"fixed":"3.9.14"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/joomla/BIT-joomla-2020-8421.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"}]}],"schema_version":"1.9.0"}