{"id":"CVE-2020-21246","aliases":["GHSA-gqr4-cvf4-3957"],"url":"https://o3.security/vulnerability/CVE-2020-21246","summary":"YiiCMS Cross Site Scripting vulnerability","details":"Cross Site Scripting vulnerability in YiiCMS v.1.0 allows a remote attacker to execute arbitrary code via the news function.","published":"2023-06-20T15:15:11.073Z","modified":"2026-07-08T20:43:02.783739Z","cvss":{"score":5.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"Packagist","name":"sheng/yiicms","fixedVersion":"1.2.1"}],"fix":null,"references":[{"type":"FIX","url":"https://github.com/yongshengli/yiicms/issues/6"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T20:43:02.783739Z"}}