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Description

The Pie Forms for WP plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 1.6 via the format_classic function. This is due to insufficient file type validation where the validate_classic method validates file extensions and sets error messages but does not prevent the file upload process from continuing. This makes it possible for unauthenticated attackers to upload files with dangerous extensions such as PHP, which makes remote code execution possible. In order to exploit this vulnerability, the attacker needs to guess the directory in which the file is placed (which is a somewhat predictable hash). In addition to that, the file name is generated using a secure hash method, limiting the exploitability of this vulnerability.

PUBLISHED Reserved 2025-10-30 | Published 2025-11-18 | Updated 2025-11-18 | Assigner Wordfence




HIGH: 8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Problem types

CWE-434 Unrestricted Upload of File with Dangerous Type

Product status

Default status
unaffected

* (semver)
affected

Timeline

2025-11-17:Disclosed

Credits

Le Viet Anh finder

References

www.wordfence.com/...-67f1-430d-bbad-3c97a4ed449e?source=cve

plugins.trac.wordpress.org/...includes/fields/fileupload.php

plugins.trac.wordpress.org/...includes/fields/fileupload.php

plugins.trac.wordpress.org/...includes/fields/fileupload.php

cve.org (CVE-2025-12528)

nvd.nist.gov (CVE-2025-12528)

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