{"id":"CVE-2021-27811","aliases":["EUVD-2021-14551","GHSA-2p4f-q7g6-g44m"],"status":"published","title":"A code injection vulnerability has been discovered in the Upgrade function of QibosoftX1 v1.0. An...","description":"A code injection vulnerability has been discovered in the Upgrade function of QibosoftX1 v1.0. An attacker is able execute arbitrary PHP code via exploitation of client_upgrade_edition.php and Upgrade.php.","severity":{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.01198,"percentile":0.6856,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-94"],"published":"2021-05-21T17:11:47Z","modified":"2026-06-17T03:45:29Z","products":[{"vendor":"qibosoft","product":"qibosoft"}],"references":[{"url":"https://github.com/whiskey-jj/w2s2x2222.github.io/issues/2","tags":["x_refsource_MISC","x_transferred","Exploit","Issue Tracking","Third Party Advisory"]},{"url":"https://www.cnvd.org.cn/flaw/show/2297879","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-27811"},{"url":"https://github.com/advisories/GHSA-2p4f-q7g6-g44m"}],"sources":{"cve":[{"id":"CVE-2021-27811","description":"A code injection vulnerability has been discovered in the Upgrade function of QibosoftX1 v1.0. An attacker is able execute arbitrary PHP code via exploitation of client_upgrade_edition.php and Upgrade.php.","status":"published","published":"2021-05-21T17:11:47Z","modified":"2024-08-03T21:33:15.915Z","updated_at":"2026-11-02T14:33:04.679189Z"}],"euvd":[{"id":"EUVD-2021-14551","description":"A code injection vulnerability has been discovered in the Upgrade function of QibosoftX1 v1.0. An attacker is able execute arbitrary PHP code via exploitation of client_upgrade_edition.php and Upgrade.php.","status":"published","published":"2021-05-21T17:11:47Z","modified":"2024-08-03T21:33:15Z","updated_at":"2026-11-03T03:24:48.366655Z"}],"ghsa":[{"id":"GHSA-2p4f-q7g6-g44m","title":"A code injection vulnerability has been discovered in the Upgrade function of QibosoftX1 v1.0. An...","description":"A code injection vulnerability has been discovered in the Upgrade function of QibosoftX1 v1.0. An attacker is able execute arbitrary PHP code via exploitation of client_upgrade_edition.php and Upgrade.php.","status":"published","published":"2022-05-24T19:02:56Z","modified":"2023-01-29T05:07:42Z","cwes":["CWE-94"],"updated_at":"2026-11-02T14:46:11.123221Z"}],"nvd":[{"id":"CVE-2021-27811","description":"A code injection vulnerability has been discovered in the Upgrade function of QibosoftX1 v1.0. An attacker is able execute arbitrary PHP code via exploitation of client_upgrade_edition.php and Upgrade.php.","status":"published","published":"2021-05-21T18:15:08.453Z","modified":"2026-06-17T03:45:29.33Z","cvss":[{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.5,"vector":"AV:N/AC:L/Au:S/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-94"],"updated_at":"2026-11-02T14:06:53.987491Z"}]}}