CVE-2025-66079: 
WordPress vulnerability analysis and mitigation

CVE-2025-66079 is a Missing Authorization (Broken Access Control) vulnerability in the Jegstudio Gutenverse Form WordPress plugin that allows authenticated low-privileged users to perform higher-privileged actions. It affects all versions of the plugin through 2.2.0, with version 2.3.0 released as the patched fix. The vulnerability was reported by Denver Jackson on October 29, 2025, and published by Patchstack on November 28, 2025. It carries a CVSS v3.1 base score of 6.5 (Medium) (Patchstack).

The vulnerability is classified as CWE-862 (Missing Authorization), meaning the plugin fails to properly verify whether a requesting user has the appropriate permissions before executing sensitive functions. Specifically, the plugin lacks proper authorization, authentication, or nonce token checks in one or more functions, enabling a Contributor- or Developer-level authenticated user to invoke actions that should be restricted to higher-privileged roles. The attack vector is network-based, requires low privileges, and has low attack complexity with no user interaction needed (Patchstack).

Successful exploitation allows an authenticated low-privileged user (Contributor or Developer role) to perform unauthorized actions within the WordPress site, resulting in a high integrity impact. There is no confidentiality or availability impact identified. In practice, this could allow attackers to manipulate form configurations, data, or other plugin-controlled content beyond their intended permission scope (Patchstack).

No public proof-of-concept exploit code or in-the-wild exploitation has been reported for this vulnerability. The EPSS score is approximately 0.028%, indicating a very low probability of exploitation in the near term. Patchstack classifies this as low priority with no impactful threat, though they note that vulnerabilities of this class are sometimes used in mass-exploit campaigns targeting WordPress sites at scale. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog (Patchstack).

1. Reconnaissance: Identify WordPress sites running the Gutenverse Form plugin version 2.2.0 or earlier using tools like WPScan or by inspecting plugin metadata in publicly accessible readme files.
2. Obtain low-privileged access: Register or obtain credentials for a Contributor or Developer account on the target WordPress site.
3. Identify unprotected endpoints: Enumerate the plugin's registered REST API routes or admin-ajax actions that lack proper capability checks or nonce validation.
4. Send unauthorized request: Craft and submit an HTTP request (e.g., POST to the vulnerable AJAX action or REST endpoint) that invokes a privileged function, bypassing the missing authorization check.
5. Achieve unauthorized action: Successfully execute a higher-privileged operation such as modifying form settings, accessing form submission data, or altering plugin configuration beyond the attacker's intended role (Patchstack).

• Logs: WordPress access logs showing unexpected POST requests to wp-admin/admin-ajax.php or REST API endpoints associated with the gutenverse-form plugin from low-privileged user accounts.
• Logs: WordPress audit logs (if enabled) recording privilege-escalating actions performed by Contributor or Developer role accounts related to Gutenverse Form plugin functions.
• File System: Unexpected changes to Gutenverse Form plugin configuration files or form data stored in the WordPress database (wp_options or custom plugin tables).
• Network: Repeated or automated requests to Gutenverse Form plugin endpoints from the same authenticated session, potentially indicating scripted exploitation attempts.

The vendor has released version 2.3.0 of the Gutenverse Form plugin, which addresses this vulnerability. Site administrators should update the plugin to version 2.3.0 or later immediately via the WordPress plugin dashboard. If an immediate update is not possible, consider temporarily deactivating the plugin or restricting Contributor/Developer role registrations until the patch can be applied. Patchstack users can enable auto-update for vulnerable plugins as an additional safeguard (Patchstack).

Patchstack, which coordinated the disclosure, classifies this as a low-priority vulnerability with no impactful threat, noting it is unlikely to be exploited despite the class of vulnerability being used in mass-exploit campaigns. The vulnerability was covered in the Wordfence Intelligence Weekly WordPress Vulnerability Report for the week of November 24–30, 2025 (Wordfence). No significant broader media coverage or notable researcher commentary has been identified.