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Bollettino del 31 ottobre 2026

CVE-2026-118235: SimpleForm – Form Maker to Chat Apps with Quiz, Poll and Multi Lead Notifications (wpazleen)

Vulnerabilità critica, punteggio 9,8 su 10, in SimpleForm – Form Maker to Chat Apps with Quiz, Poll and Multi Lead Notifications (wpazleen). Sfruttabile da remoto, via rete, senza credenziali, senza che nessuno faccia nulla. Tipo: caricamento di file pericolosi senza restrizioni.

Gravità
9,8 su 10 (critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Tipo di difetto
CWE-434: caricamento di file pericolosi senza restrizioni
Pubblicata
31 ottobre 2026

Descrizione originale

The SimpleForm – Form Maker to Chat Apps with Quiz, Poll and Multi Lead Notifications plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 3.10.2 via the handle_upload function. This is due to missing server-side file key allowlist and pre-sanitization extension derivation that allows a trailing-dot filename to bypass all extension and MIME validation in handle_upload. This makes it possible for unauthenticated attackers to upload files that may be executable, which makes remote code execution possible. The only access control is a nonce that is printed into every public form's data-nonce attribute, making it trivially obtainable by any unauthenticated visitor on a page embedding the form shortcode.

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