{"id":"CVE-2023-6551","aliases":[],"url":"https://o3.security/vulnerability/CVE-2023-6551","summary":"As a simple library, class.upload.php does not perform an in-depth check on uploaded files, allowing a stored XSS vulnerability when the default configuration is used. \n\n\nDevelopers…","details":"As a simple library, class.upload.php does not perform an in-depth check on uploaded files, allowing a stored XSS vulnerability when the default configuration is used. \n\n\nDevelopers must be aware of that fact and use extension whitelisting accompanied by forcing the server to always provide content-type based on the file extension. \n\n\nThe README has been updated to include these guidelines.","published":"2024-01-04T16:04:34.995Z","modified":"2025-06-03T14:42:21.494Z","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":0,"affectedPackages":[],"fix":null,"references":[{"type":"ADVISORY","url":"https://cert.pl/posts/2024/01/CVE-2023-6551"},{"type":"ADVISORY","url":"https://cert.pl/en/posts/2024/01/CVE-2023-6551"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2025-06-03T14:42:21.494Z"}}