CVE-2025-64228 Overview
CVE-2025-64228 is a sensitive data exposure vulnerability in the FantasticPlugins SUMO Affiliates Pro WordPress plugin (affs). The flaw affects all plugin versions up to and including 11.0.0. An authenticated attacker with low privileges can retrieve embedded sensitive system data over the network without user interaction. The issue maps to CWE-497, Exposure of Sensitive System Information to an Unauthorized Control Sphere. The vulnerability was published to the National Vulnerability Database on October 29, 2025.
Critical Impact
Authenticated low-privilege users can read sensitive system information embedded in the SUMO Affiliates Pro plugin, enabling reconnaissance for follow-on attacks against WordPress sites.
Affected Products
- FantasticPlugins SUMO Affiliates Pro (affs) plugin for WordPress
- All versions from initial release through 11.0.0
- WordPress sites running the affiliate management plugin
Discovery Timeline
- 2025-10-29 - CVE-2025-64228 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-64228
Vulnerability Analysis
The SUMO Affiliates Pro plugin exposes sensitive system information to users who should not have access to it. The plugin fails to enforce proper authorization boundaries around functionality that returns embedded system data. A network-based attacker holding a low-privilege account, such as a subscriber or affiliate user, can trigger the affected code path and read data intended for administrators.
CWE-497 describes this class of weakness. Application logic returns information about the environment, configuration, or internal state across a trust boundary. In the WordPress plugin context, the returned data can include configuration values, internal identifiers, or other embedded details that assist an attacker in mapping the target.
Root Cause
The root cause is missing or insufficient access control on a plugin endpoint or function that returns embedded sensitive data. The plugin does not restrict the disclosed information to appropriately privileged roles. Low-privilege authenticated sessions inherit access that should be reserved for site administrators.
Attack Vector
Exploitation requires network access to the WordPress site and a valid low-privilege account. No user interaction is needed. The attacker authenticates, sends a request to the vulnerable plugin functionality, and receives sensitive data in the response. There is no direct integrity or availability impact, only confidentiality loss. See the Patchstack Vulnerability Report for the vendor-tracked technical details.
Detection Methods for CVE-2025-64228
Indicators of Compromise
- Unexpected authenticated requests to SUMO Affiliates Pro (affs) plugin endpoints from subscriber or affiliate accounts
- Anomalous access patterns from low-privilege WordPress users targeting plugin admin functionality
- Elevated volumes of plugin-related requests originating from a single IP or session
Detection Strategies
- Audit WordPress access logs for requests to /wp-admin/admin-ajax.php or plugin-specific paths tied to affs from non-administrator accounts
- Monitor HTTP responses from plugin endpoints for payload sizes consistent with data enumeration
- Correlate low-privilege session activity with sequential plugin endpoint requests indicative of reconnaissance
Monitoring Recommendations
- Enable verbose WordPress and web server logging on sites running SUMO Affiliates Pro
- Alert on any authenticated user role transition or unusual affiliate account creation followed by plugin API access
- Track plugin version inventory across WordPress deployments to identify hosts running 11.0.0 or earlier
How to Mitigate CVE-2025-64228
Immediate Actions Required
- Inventory all WordPress sites and identify installations of SUMO Affiliates Pro at version 11.0.0 or earlier
- Restrict or disable affiliate account self-registration on affected sites until a patched version is deployed
- Review affiliate and subscriber accounts for suspicious activity or unauthorized enumeration attempts
Patch Information
At the time of publication, the NVD entry lists affected versions through 11.0.0 with no fixed version explicitly specified in the referenced data. Site administrators should consult the Patchstack Vulnerability Report and the vendor for the fixed release and upgrade guidance.
Workarounds
- Deactivate the SUMO Affiliates Pro plugin until a fixed version is available and deployed
- Apply a web application firewall rule blocking non-administrator access to plugin admin endpoints
- Enforce least-privilege role assignments and remove unused affiliate or subscriber accounts
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
