CVE-2026-19860mediumCWE-73

CVE-2026-19860: medium-severity vulnerability in JetFormBuilder — Dynamic Blocks Form Builder

JetFormBuilder 3.5.6.2 - 3.6.5.2 - Admin+ Arbitrary File Deletion via Server-Side Validation Callback

Published

Follow this CVE+ Monitor JetFormBuilder — Dynamic Blocks Form Builder

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

33Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 5.5epss 0.4%
The JetFormBuilder — Dynamic Blocks Form Builder WordPress plugin before 3.6.5.3 does not sufficiently restrict which PHP functions can be used as a custom field-validation callback, relying on a blocklist that omits a file-deletion function, allowing users able to manage forms to cause arbitrary files on the server to be deleted. The deletion itself is carried out when the form is submitted, which requires no authentication.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:L
Affected products
Unknown · JetFormBuilder — Dynamic Blocks Form Builder
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — JetFormBuilder — Dynamic Blocks Form Builder

In the same product, most dangerous first.

CVE-2026-19858HIGHJetFormBuilder < 3.6.5.2 - Unauthenticated Password Hash and Arbitrary Metadata Disclosure via Dynamic PresetEPSS 0.4%CVE-2026-19861MEDIUMJetFormBuilder < 3.6.5.2 - Unauthenticated Stored XSS via WYSIWYG Field in Notification EmailsEPSS 0.2%