User Activity Log <= 2.2 - Unauthenticated Limited Arbitrary Option Update
Strategic Overview
- Status
- Unpatched
- Affected Plugin
- User Activity Log
- Affected Version
<= 2.2- CVSS
- 5.3Medium
- Weakness type
- CWE-639 · Authorization Bypass Through User-Controlled Key
- CVE
CVE-2025-13471
At a glance
CVE-2025-13471 is a medium-severity Authorization Bypass Through User-Controlled Key vulnerability in the User Activity Log WordPress plugin, affecting versions <= 2.2. It carries a CVSS score of 5.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. No fixed release has been reported yet; treat installations running this software as exposed. Disclosed January 2026, reported by Alex Tselevich (nos3curity).
Vulnerability Overview
The User Activity Log plugin for WordPress is vulnerable to unauthorized modification of data that can lead to a denial of service due to a missing capability check in all versions up to, and including, 2.2. This makes it possible for unauthenticated attackers to update option values to one on the WordPress site. This can be leveraged to update an option that would create an error on the site and deny service to legitimate users or be used to set some values to true such as registration.
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.
CWE-639: Authorization Bypass Through User-Controlled Key
Reaching this weakness in User Activity Log <= 2.2 takes no account at all. Authorization bypass through a user-controlled key, often called insecure direct object reference, means the application looks up a record by an identifier from the request without checking that the caller owns it.
Changing a number in the request is enough to read or modify other users' records, which on commerce and membership sites means customer data. No fixed build of this plugin is recorded for User Activity Log yet, so installs running <= 2.2 stay exposed until the vendor ships one.
Remediation
No known patch available. Please review the vulnerability's details in depth and employ mitigations based on your organization's risk tolerance. It may be best to uninstall the affected software and find a replacement.
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. No patched version is recorded yet, which is the case where a filtering layer matters most, because there is nothing to update to.
- Login Security
- Alerts
External References
Related records
Other vulnerabilities in User Activity Log
- 9.1CVE-2024-31356: User Activity Log <= 1.9 SQL Injection
CVE-2024-31356 - 8.1User Activity Log <= 1.6.2 SQL Injection via username
- 7.5CVE-2025-11877: User Activity Log <= 2.2 Limited Options Update
CVE-2025-11877 - 7.5CVE-2023-4269: User Activity Log Data Export to Info Disclosure
CVE-2023-4269 - 7.5CVE-2023-3435: User Activity Log <= 1.6.4 SQL Injection
CVE-2023-3435 - 7.2CVE-2023-37966: User Activity Log <= 1.6.2 SQL Injection
CVE-2023-37966 - 6.6CVE-2023-2761: User Activity Log <= 1.6.2 SQL Injection
CVE-2023-2761 - 6.1User Activity Log <= 1.4.6 Reflected Cross-Site Scripting
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