The Piotnet Forms plugin for WordPress is vulnerable to arbitrary file upload due to missing file type validation in the 'piotnetforms_ajax_form_builder' function in all versions up to, and including, 2.1.40. The plugin uses an incomplete extension blacklist that only blocks php, phpt, php5, php7, and exe extensions, while allowing dangerous extensions such as .phar or .phtml to be uploaded. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible. Note: The exploit can only be exploited if a file field is added to the form.
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Affected Vendors & Products
References
History
Tue, 19 May 2026 15:30:00 +0000
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ssvc
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Tue, 19 May 2026 13:45:00 +0000
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Piotnet
Piotnet piotnet Forms Wordpress Wordpress wordpress |
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Piotnet
Piotnet piotnet Forms Wordpress Wordpress wordpress |
Tue, 19 May 2026 12:30:00 +0000
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| Description | The Piotnet Forms plugin for WordPress is vulnerable to arbitrary file upload due to missing file type validation in the 'piotnetforms_ajax_form_builder' function in all versions up to, and including, 2.1.40. The plugin uses an incomplete extension blacklist that only blocks php, phpt, php5, php7, and exe extensions, while allowing dangerous extensions such as .phar or .phtml to be uploaded. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible. Note: The exploit can only be exploited if a file field is added to the form. | |
| Title | Piotnet Forms <= 2.1.40 - Unauthenticated Arbitrary File Upload via Form File Upload | |
| Weaknesses | CWE-434 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: Wordfence
Published:
Updated: 2026-05-19T13:44:33.801Z
Reserved: 2026-03-26T08:46:53.428Z
Link: CVE-2026-4883
Updated: 2026-05-19T13:44:30.335Z
Status : Deferred
Published: 2026-05-19T13:16:19.340
Modified: 2026-05-19T14:38:39.660
Link: CVE-2026-4883
No data.
OpenCVE Enrichment
Updated: 2026-05-19T13:30:05Z