{"id":"CVE-2021-3734","aliases":["GHSA-r6g8-jmj9-g945"],"url":"https://o3.security/vulnerability/CVE-2021-3734","summary":"Improper Restriction of Rendered UI Layers or Frames in yourls","details":"yourls is vulnerable to Improper Restriction of Rendered UI Layers or Frames","published":"2021-08-26T13:15:08.677Z","modified":"2026-07-08T22:13:40.484170Z","cvss":{"score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},"epss":{"score":0.00405,"percentile":0.34341,"asOf":"2026-09-16"},"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"Packagist","name":"yourls/yourls","fixedVersion":null}],"fix":{"url":"https://github.com/yourls/yourls/commit/0a70acdcfb5fcbc63dbc5750018d608288eba3fe","label":"yourls/yourls@0a70acd"},"references":[{"type":"REPORT","url":"https://huntr.dev/bounties/dd2e2dbe-efe5-49ec-be11-7a7e7c41debd"},{"type":"FIX","url":"https://github.com/yourls/yourls/commit/0a70acdcfb5fcbc63dbc5750018d608288eba3fe"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-3734"},{"type":"PACKAGE","url":"https://github.com/yourls/yourls"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T22:13:40.484170Z"}}