CVE-2026-19860
MediumCVSS 5.5Exploitation Probability (EPSS)
Low risk14th percentile - higher than 14% of all known CVEs
Summary
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.
Risk Assessment
An attacker with form management privileges can delete critical server files, potentially leading to site downtime, data loss, or further attack escalation.
Recommendation
Update the plugin to version 3.6.5.3 or later. Restrict form management permissions and regularly back up server files.
Other vulnerabilities in JetFormBuilder
See all- CVE-2026-54195High
Versions of JetFormBuilder <= 3.6.0.1 are vulnerable to unauthenticated Cross Site Scripting (XSS). An attacker can exploit this vulnerability to inject malicious JavaScript code.
- CVE-2026-84817High
Unauthenticated Cross Site Scripting (XSS) vulnerability in JetFormBuilder versions up to 3.6.5.1. Allows an attacker to inject malicious script into a page, which executes in the victim's browser.
- CVE-2026-19859Medium
The JetFormBuilder WordPress plugin before 3.6.5.2 does not sanitize a request parameter before rendering it as message content, allowing unauthenticated users to execute arbitrary shortcodes registered on the site on any page displaying a form. Escaping is applied to that content before a later shortcode-expansion pass rather than after it, so the escaping can be bypassed.
- CVE-2026-19861Medium
The JetFormBuilder — Dynamic Blocks Form Builder WordPress plugin before version 3.6.5.2 does not properly sanitise and escape a form field's value before including it in HTML notification emails. This allows unauthenticated users to inject arbitrary HTML into messages delivered to administrators and other recipients. Whether injected script executes depends on the recipient's mail client, but the injected markup is rendered regardless.
- CVE-2026-19858High
The JetFormBuilder — Dynamic Blocks Form Builder WordPress plugin before version 3.6.5.2 does not perform authorisation checks when resolving request-derived data during page rendering. This allows unauthenticated users to read arbitrary user, post and term properties and metadata, including password hashes, private and draft content, and secrets stored in metadata by the plugin.
- CVE-2026-28140High
Unauthenticated Broken Access Control vulnerability in JetFormBuilder versions up to 3.6.4.1. Allows unauthorized users to access functions they should not have permissions for.
- CVE-2026-13459Medium
The JetFormBuilder plugin for WordPress up to version 3.6.3 has an authorization bypass vulnerability, allowing unauthenticated attackers to retrieve any values from post meta, including WooCommerce PII, order totals, attachment paths, and third-party plugin credentials. Exploitation requires at least one published form with a get_from_db generator field.
- CVE-2026-54196Medium
The JetFormBuilder plugin by Jetmonsters contains an Incorrect Privilege Assignment vulnerability that allows Privilege Escalation. This issue affects JetFormBuilder from an unspecified version through 3.6.1.
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS