CVE-2025-3952: Projectopia WordPress Plugin DoS Vulnerability

CVE-2025-3952 Overview

CVE-2025-3952 affects the Projectopia – WordPress Project Management plugin in all versions up to and including 5.1.16. The vulnerability stems from a missing capability check on the pto_remove_logo function, allowing authenticated users with Subscriber-level access or higher to delete arbitrary option values from the WordPress database. Attackers can leverage this to remove options critical to site operation, triggering errors and denying service to legitimate users. The flaw is categorized under [CWE-862] Missing Authorization.

Critical Impact
Any authenticated Subscriber can delete arbitrary WordPress options, producing site-wide errors and denial of service against the affected installation.

Affected Products

Projectopia – WordPress Project Management plugin versions through 5.1.16
WordPress sites running the projectopia-core component
Any deployment permitting Subscriber-level registration with Projectopia installed

Discovery Timeline

2025-05-01 - CVE-2025-3952 published to the National Vulnerability Database (NVD)
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-3952

Vulnerability Analysis

The vulnerability resides in the pto_remove_logo function within includes/functions/admin/admin_functions.php of the projectopia-core plugin. The function exposes an action handler intended for administrators to clear the plugin's stored logo option. However, the handler omits a WordPress capability check (current_user_can()) and does not validate that the caller holds an administrative role.

Because the handler accepts an option name from the request and passes it to a deletion routine, an authenticated attacker can supply the name of any WordPress option and remove it. Deletion of options such as siteurl, home, template, or stylesheet causes the site to throw fatal errors or fail to load, resulting in denial of service.

Root Cause

The root cause is broken access control: the AJAX or admin-post endpoint backing pto_remove_logo relies solely on a valid authenticated session rather than verifying the user holds the manage_options capability. Combined with insufficient input validation on the option name parameter, the handler permits arbitrary delete_option() calls from low-privilege users.

Attack Vector

Exploitation requires network access and a valid authenticated session at Subscriber level or above. An attacker registers or logs in, then issues a crafted request to the plugin endpoint invoking pto_remove_logo with the target option key. No user interaction beyond the attacker's own request is required, and the impact extends to integrity and availability of the entire WordPress site.

No public proof-of-concept exploit is currently listed for CVE-2025-3952. Technical details are available in the WordPress Plugin Function Code and the Wordfence Vulnerability Overview.

Detection Methods for CVE-2025-3952

Indicators of Compromise

Unexpected WSOD (white screen of death) or PHP fatal errors after a Subscriber-level user logs in.
Web server access logs showing authenticated POST requests to admin-ajax.php or admin-post.php referencing the pto_remove_logo action.
Missing critical options in the wp_options table such as siteurl, home, template, or active_plugins.
New low-privilege user registrations followed shortly by site-wide errors.

Detection Strategies

Inspect WordPress audit logs and web server logs for requests invoking the pto_remove_logo action originating from non-administrator accounts.
Compare current wp_options content against known-good backups to identify deletions.
Deploy a Web Application Firewall (WAF) rule that blocks requests to the pto_remove_logo action from sessions lacking the administrator role.

Monitoring Recommendations

Alert on PHP fatal errors and HTTP 500 responses correlated with authenticated low-privilege sessions.
Track creation and authentication of Subscriber accounts on sites exposing self-registration.
Monitor changes to the wp_options table using a file integrity or database integrity tool.

How to Mitigate CVE-2025-3952

Immediate Actions Required

Update the Projectopia plugin to a version newer than 5.1.16 that incorporates the upstream fix.
Disable the plugin if an updated version cannot be installed immediately on production sites.
Disable open user registration or restrict registration to the Subscriber role on a vetted basis until the patch is applied.
Audit the wp_options table and restore any options that have been deleted.

Patch Information

The vendor committed a fix to the plugin repository as referenced in the WordPress Project Changeset. The patch introduces a capability check ensuring only privileged users can invoke pto_remove_logo. Apply this update through the WordPress plugin updater on all affected sites.

Workarounds

Block requests containing the pto_remove_logo action at the WAF or reverse-proxy layer for non-administrator sessions.
Temporarily remove or rename the projectopia-core plugin directory to neutralize the vulnerable endpoint until patching is possible.
Enforce least-privilege role assignment and disable public registration on sites that do not require it.

bash

# Example WAF/Nginx rule to block exploitation attempts
location = /wp-admin/admin-ajax.php {
    if ($arg_action = "pto_remove_logo") {
        return 403;
    }
}