{"action":"Upgrade github.com/knadh/listmonk to 1.1.1-0.20251231125615-74dc5a01cfbb or later.","affected":[{"fixed":"1.1.1-0.20251231125615-74dc5a01cfbb","introduced":"0"}],"component":"github.com/knadh/listmonk","cve_ids":["CVE-2026-21483"],"ecosystem":"Go","epss":0.00226,"exploited":false,"fixed_versions":["1.1.1-0.20251231125615-74dc5a01cfbb"],"ghsa_id":"GHSA-jmr4-p576-v565","id":"tcs_01M5KGCV4WWF997582HRAT5EKS","modified_at":"2026-01-12T18:11:10.248518Z","published_at":"2026-01-12T17:39:39Z","references":["https://osv.dev/vulnerability/GO-2026-4277","https://github.com/knadh/listmonk/security/advisories/GHSA-jmr4-p576-v565","https://nvd.nist.gov/vuln/detail/CVE-2026-21483","https://github.com/knadh/listmonk/commit/74dc5a01cfbb12cf218cb33ddad8410c53e2e915","https://github.com/knadh/listmonk/releases/tag/v6.0.0"],"severity":{"label":"medium","score":5.4},"sources":[{"source":"osv","source_id":"GO-2026-4277","url":"https://osv.dev/vulnerability/GO-2026-4277"},{"source":"nvd","source_id":"CVE-2026-21483","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-21483"}],"summary":"listmonk Vulnerable to Stored XSS Leading to Admin Account Takeover in github.com/knadh/listmonk"}