PeproDev Ultimate Profile Solutions 1.9.1 - 7.5.2 - Missing Authorization to Limited Unauthenticated Arbitrary User Meta Update via handel_ajax_req Function
Strategic Overview
- Status
- Patched in 8.0.0
- Affected Plugin
- PeproDev Ultimate Profile Solutions
- Affected Version
1.9.1 – 7.5.2- CVSS
- 8.2High
- Weakness type
- CWE-285 · Improper Authorization
- CVE
CVE-2025-3921
At a glance
CVE-2025-3921 is a high-severity Improper Authorization vulnerability in the PeproDev Ultimate Profile Solutions WordPress plugin, affecting versions 1.9.1 – 7.5.2. It carries a CVSS score of 8.2 (reachable over the network; low attack complexity; high integrity impact). Exploitation requires no authentication. The issue is fixed in version 8.0.0; sites on affected versions should update now. Disclosed May 2025, reported by kr0d.
Vulnerability Overview
The PeproDev Ultimate Profile Solutions plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the handel_ajax_req() function in versions 1.9.1 to 7.5.2. This makes it possible for unauthenticated attackers to update arbitrary user's metadata which can be leveraged to block an administrator from accessing their site when wp_capabilities is set to 0.
Technical Analysis
The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user. A successful exploit has high impact on integrity.
CWE-285: Improper Authorization
PeproDev Ultimate Profile Solutions 1.9.1 – 7.5.2 carries this weakness at handel_ajax_req(), and reaching it takes no account at all. Improper authorization means a permission check exists but does not cover the case being exercised, so a caller who is allowed to do one thing is allowed to do a neighbouring thing as well.
A lower-privileged account performs an action reserved for a higher one, which on a multi-author or membership site means an ordinary user reaching administrative behaviour. For PeproDev Ultimate Profile Solutions the fix is 8.0.0: builds 1.9.1 – 7.5.2 are affected, anything from 8.0.0 onward is not.
Remediation
Update to version 8.0.0, or a newer patched version
How does WordSec protect against this?
This one needs no account at all, which puts it outside what login hardening can reach; WordSec's login security narrows the account-level paths around it, and the firewall is what inspects the request itself. None of that substitutes for the fix: PeproDev Ultimate Profile Solutions 8.0.0 closes this, and updating the plugin is the step that ends it.
- Login Security
- Alerts
External References
Related records
Same weakness class
Other vulnerabilities in PeproDev Ultimate Profile Solutions
Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C