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Vulnerability record · CVE-2026-3328 · published 26 March 2026

CVE-2026-3328: Deserialization of untrusted data vulnerability

The Frontend Admin by DynamiApps plugin for WordPress is vulnerable to PHP Object Injection via deserialization of the 'post_content' of admin_form posts in all versions up to, and including, 3.28.31. This is due to the use of WordPress's `maybe_unserialize()` function without class restrictions on user-controllable content stored in admin_form post content. This makes it possible for authenticated attackers, with Editor-level access and above, to inject a PHP Object. The additional presence of a POP chain allows attackers to achieve remote code execution.

7.2 CVSS 3.1 High EPSS 1.0% · top 38.2% CWE-502 · Deserialization of untrusted data Deferred
7.2CVSS 3.1 base score
1.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

The Frontend Admin by DynamiApps plugin for WordPress is vulnerable to PHP Object Injection via deserialization of the 'post_content' of admin_form posts in all versions up to, and including, 3.28.31. This is due to the use of WordPress's `maybe_unserialize()` function without class restrictions on user-controllable content stored in admin_form post content. This makes it possible for authenticated attackers, with Editor-level access and above, to inject a PHP Object. The additional presence of a POP chain allows attackers to achieve remote code execution.

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

References

LinkTags
https://plugins.trac.wordpress.org/browser/acf-frontend-form-element/tags/3.28.27/main/admin/admin-pages/forms/settings.
https://plugins.trac.wordpress.org/browser/acf-frontend-form-element/trunk/main/admin/admin-pages/forms/settings.php#L41
https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3486785%40acf-frontend-form-element&new
https://www.wordfence.com/threat-intel/vulnerabilities/id/0faa8f07-88c1-4638-9de5-e202807866e1?source=cve

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Source: NIST National Vulnerability Database (record CVE-2026-3328), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.