CVE-2026-57633 Overview
CVE-2026-57633 is an unauthenticated sensitive data exposure vulnerability in the WCBoost Products Compare WordPress plugin, affecting versions up to and including 1.1.0. The flaw is categorized under CWE-497, which covers exposure of sensitive system information to an unauthorized control sphere. Remote attackers can retrieve sensitive data over the network without authentication or user interaction. The issue was published to the National Vulnerability Database (NVD) on 2026-06-26.
Critical Impact
Unauthenticated remote attackers can access sensitive information exposed by the plugin, which may aid reconnaissance and follow-on attacks against affected WordPress sites.
Affected Products
- WCBoost Products Compare plugin for WordPress
- Versions <= 1.1.0
- WordPress sites running the vulnerable plugin with default configuration
Discovery Timeline
- 2026-06-26 - CVE CVE-2026-57633 published to NVD
- 2026-06-26 - Last updated in NVD database
Technical Details for CVE-2026-57633
Vulnerability Analysis
The vulnerability stems from improper access control over sensitive information handled by the WCBoost Products Compare plugin. The plugin exposes data through an interface that does not verify the identity or authorization of the requester. As a result, attackers with only network reachability to the target WordPress site can obtain information intended to be restricted.
The issue is classified under [CWE-497], which addresses exposure of sensitive system information. According to Patchstack, the flaw impacts confidentiality without affecting integrity or availability. Attack complexity is low, no privileges are required, and no user interaction is needed.
Root Cause
The root cause is missing authentication and authorization checks on functionality that returns sensitive data. Requests that should be gated by capability checks or nonce validation are processed for anonymous users. The plugin trusts client-supplied context rather than enforcing server-side access control before returning data.
Attack Vector
An attacker sends crafted HTTP requests to the vulnerable endpoints exposed by the plugin on a target WordPress site. Because the vector is network-based and unauthenticated, exploitation can be automated at scale against internet-facing WordPress installations. Refer to the Patchstack Vulnerability Report for additional technical context. No public proof-of-concept exploit is currently listed for this CVE.
Detection Methods for CVE-2026-57633
Indicators of Compromise
- Unauthenticated HTTP GET or POST requests to WCBoost Products Compare plugin endpoints under /wp-content/plugins/wcboost-products-compare/ or associated AJAX actions
- Repeated anonymous requests to admin-ajax.php or REST routes referencing the compare plugin from a single source IP
- Web server logs showing enumeration patterns against WordPress sites hosting the plugin
Detection Strategies
- Inventory WordPress deployments to identify installations of WCBoost Products Compare at version <= 1.1.0
- Monitor web access logs for anonymous requests to plugin-specific endpoints returning non-empty response bodies
- Deploy web application firewall (WAF) rules that flag high-volume unauthenticated access to plugin routes
Monitoring Recommendations
- Alert on outbound data volumes from WordPress hosts that exceed baseline for anonymous sessions
- Correlate access logs with authentication logs to identify anonymous data retrieval patterns
- Track new plugin versions in change management to ensure patched releases are applied promptly
How to Mitigate CVE-2026-57633
Immediate Actions Required
- Identify all WordPress sites running WCBoost Products Compare version 1.1.0 or earlier
- Update the plugin to a fixed version once released by the vendor, per the Patchstack Vulnerability Report
- Restrict network access to WordPress admin and AJAX endpoints where feasible
Patch Information
Users should consult the Patchstack Vulnerability Report for the vendor's remediation guidance and updated plugin version details. Apply the patched release as soon as it is available.
Workarounds
- Disable and remove the WCBoost Products Compare plugin until a fixed version is deployed
- Apply WAF virtual patching rules that block unauthenticated requests to affected plugin endpoints
- Restrict access to wp-admin/admin-ajax.php for the vulnerable action names via web server or WAF configuration
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
