CVE-2025-64356 Overview
CVE-2025-64356 is a missing authorization vulnerability [CWE-862] in the f1logic Insert PHP Code Snippet plugin for WordPress. The flaw affects all plugin versions up to and including 1.4.3. The plugin fails to enforce proper access control checks, allowing authenticated users with low privileges to interact with functionality that should be restricted to administrators. An attacker exploiting this issue can access resources or perform actions outside their intended permission level.
Critical Impact
Authenticated attackers with low-level access can exploit incorrectly configured access control checks in the Insert PHP Code Snippet plugin to access restricted plugin functionality on affected WordPress sites.
Affected Products
- f1logic Insert PHP Code Snippet WordPress plugin
- All versions from n/a through 1.4.3
- WordPress sites with the vulnerable plugin installed and active
Discovery Timeline
- 2025-10-31 - CVE-2025-64356 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-64356
Vulnerability Analysis
The Insert PHP Code Snippet plugin exposes functionality that lacks proper authorization checks. WordPress plugins typically enforce access control using capability checks such as current_user_can() combined with nonce verification. The affected plugin either omits these checks entirely or applies incorrect capability levels to sensitive actions.
The vulnerability is classified under CWE-862 (Missing Authorization). An attacker with a valid low-privilege account, such as a subscriber or contributor, can invoke plugin endpoints intended for administrators. The attack requires network access to the WordPress site and authenticated but low-privileged credentials.
The impact is limited to confidentiality according to the CVSS vector, meaning affected functionality exposes information or resources rather than allowing modification or service disruption directly through this flaw.
Root Cause
The root cause is incorrectly configured access control at the plugin's request handlers. The plugin does not validate that the requesting user holds the required WordPress capability before executing privileged operations. This allows any authenticated user session to bypass the intended administrative boundary.
Attack Vector
An attacker first obtains authenticated access to the target WordPress site, either through registration on sites that permit it or through compromised low-privilege credentials. The attacker then issues HTTP requests to the plugin's exposed endpoints. Because the plugin does not enforce capability checks, the requests succeed despite the attacker lacking administrative privileges.
The vulnerability mechanism is described in the Patchstack Vulnerability Report. No verified proof-of-concept code is publicly available at the time of writing.
Detection Methods for CVE-2025-64356
Indicators of Compromise
- Unexpected HTTP requests to wp-admin/admin-ajax.php or plugin-specific endpoints originating from low-privileged user sessions
- WordPress audit logs showing plugin configuration changes performed by non-administrative accounts
- New or modified PHP code snippets in the plugin's stored configuration that were not authorized by administrators
Detection Strategies
- Monitor WordPress access logs for requests to insert-php-code-snippet plugin endpoints made by users below the administrator role
- Deploy a WordPress security plugin or web application firewall rule that logs authenticated actions against plugin AJAX handlers
- Compare plugin settings and stored snippets against a known-good baseline to identify unauthorized modifications
Monitoring Recommendations
- Enable WordPress activity logging with per-user action tracking to correlate low-privilege accounts with sensitive plugin activity
- Alert on any new user registrations followed shortly by requests to administrative plugin endpoints
- Review the vulnerability entry regularly at the Patchstack advisory for updates on exploitation activity
How to Mitigate CVE-2025-64356
Immediate Actions Required
- Update the Insert PHP Code Snippet plugin to a version later than 1.4.3 once the vendor releases a patched release
- Deactivate and remove the plugin if a patched version is not yet available and the functionality is not business-critical
- Audit existing WordPress user accounts and remove or downgrade unnecessary low-privilege accounts that could be abused
Patch Information
At the time of publication, no fixed version above 1.4.3 is referenced in the CVE record. Site administrators should monitor the Patchstack advisory and the plugin's WordPress.org listing for a security release.
Workarounds
- Restrict user registration on the WordPress site to trusted individuals only, or disable open registration entirely
- Apply web application firewall rules that block or challenge requests to plugin-specific endpoints from non-administrator sessions
- Enforce strong password policies and multi-factor authentication for all WordPress accounts to reduce credential compromise risk
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
