{"id":"GHSA-fgxj-g7x3-85cq","aliases":["CVE-2023-28820"],"title":"Stored cross site scripting in RSS displayer","titleSource":"OSV","descriptionSource":"OSV","declaredSeverity":"LOW","description":"Concrete CMS (previously concrete5) before 9.1 is vulnerable to stored XSS in RSS Displayer via the href attribute because the link element input was not sanitized.","severity":"low","score":2,"published":"2023-04-28T15:30:19.000Z","modified":"2026-09-10T03:50:00.793Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"Packagist","name":"concrete5/concrete5","sources":[{"name":"OSV · GHSA-fgxj-g7x3-85cq","url":"https://osv.dev/vulnerability/GHSA-fgxj-g7x3-85cq"}],"ranges":[{"events":[{"introduced":"0"},{"fixed":"9.1.0"}],"type":"ECOSYSTEM"}],"versions":["8.0","8.0.1","8.0.2","8.0.3","8.1.0","8.2.0","8.2.0RC2","8.2.1","8.3.0","8.3.1","8.3.2","8.4.0","8.4.0RC3","8.4.0RC4","8.4.1","8.4.2","8.4.3","8.4.4","8.4.5","8.5.0","8.5.0RC1","8.5.0RC2","8.5.1","8.5.10","8.5.11","8.5.12","8.5.13","8.5.14","8.5.15","8.5.16","8.5.17","8.5.18","8.5.19","8.5.2","8.5.20","8.5.21","8.5.3","8.5.4","8.5.5","8.5.6","8.5.6RC1","8.5.7","8.5.8","8.5.9","9.0.0","9.0.0RC1","9.0.0RC3","9.0.0RC4","9.0.1","9.0.2"],"fixed":["9.1.0"]}],"sourceAffected":[],"references":["https://nvd.nist.gov/vuln/detail/CVE-2023-28820","https://github.com/concretecms/concretecms","https://github.com/concretecms/concretecms/releases","https://www.concretecms.org/about/project-news/security/concrete-cms-security-advisory-2023-04-20"],"sources":[{"name":"OSV","id":"GHSA-fgxj-g7x3-85cq","modified":"2026-09-10T03:50:00.793662293Z","url":"https://osv.dev/vulnerability/GHSA-fgxj-g7x3-85cq"}],"assessments":[{"source":"OSV","vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:N","score":2}],"products":[],"remediation":[],"kev":{"status":"not-listed","checkedAt":"2026-10-28T23:25:34.350Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[]}