| Titre | wuzhicms <=4.1.0 Arbitrary File Write (RCE) |
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| Description | member::setAvatar() accepts a user's avatar upload. The extension of the resulting filename is derived from $_FILES['file']['name'] (the raw, client-supplied filename, which is entirely untrusted), using only strtolower(pathinfo(...)) to extract the extension — with no extension whitelist, no MIME-type validation, and no image-content validation via getimagesize()/exif_imagetype(). The file is then written directly via move_uploaded_file() into the uploadfile/member/<uid>/ directory. This directory is directly served by the web server and PHP execution is permitted there, so an attacker who uploads a .php-suffixed web shell can trigger execution simply by requesting the predictable resulting URL. |
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| La source | ⚠️ https://github.com/wuzhicms/wuzhicms/issues/219 |
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| Utilisateur | ZAST.AI (UID 87884) |
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| Soumission | 17/08/2026 07:22 (il y a 1 mois) |
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| Modérer | 15/09/2026 10:44 (29 days later) |
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| Statut | Accepté |
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| Entrée VulDB | 404077 [WuzhiCMS jusqu’à 4.1.0 Avatar Upload index.php?m=member&f=user&v=setAvatar member::setAvatar Fichier élévation de privilèges] |
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| Points | 20 |
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