{"id":"CVE-2021-26642","aliases":["GHSA-8r5j-22j5-w4cm"],"url":"https://o3.security/vulnerability/CVE-2021-26642","summary":"XpressEngine vulnerable to Unrestricted Upload of File with Dangerous Type","details":"When uploading an image file to a bulletin board developed with XpressEngine, a vulnerability in which an arbitrary file can be uploaded due to insufficient verification of the file. A remote attacker can use this vulnerability to execute arbitrary code on the server where the bulletin board is running.","published":"2023-01-20T17:15:10.300Z","modified":"2026-07-08T22:13:35.594528Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"xpressengine/xpressengine","fixedVersion":"3.0.15"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://boho.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=67125"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-26642"},{"type":"WEB","url":"https://github.com/xpressengine/xpressengine/issues/1366"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T22:13:35.594528Z"}}