{"action":"Upgrade flarum/sticky to 0.1.0-beta.15.1 or later.","affected":[{"fixed":"0.1.0-beta.15.1","introduced":"0.1.0-beta.14"}],"component":"flarum/sticky","cve_ids":["CVE-2021-21283"],"ecosystem":"Packagist","epss":0.00797,"exploited":false,"fixed_versions":["0.1.0-beta.15.1"],"ghsa_id":"GHSA-h3gg-7wx2-cq3h","id":"tcs_01M5KF38Z2ENEBGRDYNRPH1S5R","modified_at":"2026-07-08T05:59:43.051037613Z","published_at":"2021-01-29T18:13:41Z","references":["https://osv.dev/vulnerability/GHSA-h3gg-7wx2-cq3h","https://github.com/flarum/sticky/security/advisories/GHSA-h3gg-7wx2-cq3h","https://nvd.nist.gov/vuln/detail/CVE-2021-21283","https://github.com/flarum/sticky/pull/24","https://github.com/flarum/sticky/commit/7ebd30462bd405c4c0570b93a6d48710e6c3db19","https://discuss.flarum.org/d/26042-security-update-to-flarum-sticky-010-beta151)"],"severity":{"label":"medium"},"sources":[{"source":"osv","source_id":"GHSA-h3gg-7wx2-cq3h","url":"https://osv.dev/vulnerability/GHSA-h3gg-7wx2-cq3h"}],"summary":"XSS in Flarum Sticky extension"}