CVE-2026-54834 Overview
CVE-2026-54834 is an unauthenticated sensitive data exposure vulnerability affecting the Object Cache 4 everyone WordPress plugin in versions 2.3.2 and earlier. The flaw is classified under CWE-201: Insertion of Sensitive Information Into Sent Data, indicating that data intended to remain private is exposed to unauthorized parties. Remote attackers can access sensitive information over the network without authentication or user interaction. According to the Patchstack Vulnerability Report, the vulnerability affects confidentiality without impacting integrity or availability.
Critical Impact
Unauthenticated remote attackers can retrieve sensitive information from vulnerable WordPress sites running Object Cache 4 everyone <= 2.3.2.
Affected Products
- Object Cache 4 everyone WordPress plugin versions <= 2.3.2
- WordPress sites with the plugin installed and active
- Any site using cached objects handled by this plugin
Discovery Timeline
- 2026-06-26 - CVE-2026-54834 published to NVD
- 2026-06-26 - Last updated in NVD database
Technical Details for CVE-2026-54834
Vulnerability Analysis
The vulnerability resides in the Object Cache 4 everyone plugin, which provides persistent object caching functionality for WordPress. The plugin exposes sensitive data through resources accessible without authentication. Attackers exploit this weakness by sending crafted network requests to the vulnerable WordPress site.
The scope is limited to information disclosure. The vulnerability does not permit modification of data or disruption of service. However, the exposed information may include cached data, configuration values, or other artifacts that support follow-on attacks against the WordPress environment.
The EPSS score is 0.294%, placing the vulnerability in the 21st percentile for exploitation likelihood. No public proof-of-concept exploit is currently listed, and the vulnerability is not present on the CISA Known Exploited Vulnerabilities catalog.
Root Cause
The root cause is improper protection of cached objects and related resources maintained by the plugin. The plugin fails to enforce authentication or access controls on endpoints or files that contain sensitive information. This aligns with [CWE-201], where sensitive information is inadvertently included in data sent to unauthorized recipients.
Attack Vector
The attack vector is network-based and requires no privileges or user interaction. An unauthenticated attacker sends HTTP requests to the target WordPress instance to retrieve exposed data. Because the plugin operates within the WordPress request lifecycle, exploitation blends with routine web traffic. Refer to the Patchstack advisory for the specific exposure path.
No verified exploitation code is available. The vulnerability mechanism is described in prose based on the vendor advisory.
Detection Methods for CVE-2026-54834
Indicators of Compromise
- Unauthenticated HTTP GET requests targeting plugin paths under /wp-content/plugins/object-cache-4-everyone/
- Repeated requests from a single source enumerating cache-related resources
- Unusual outbound data flows following requests to plugin endpoints
Detection Strategies
- Inspect web server access logs for anonymous requests to Object Cache 4 everyone plugin resources returning HTTP 200 responses
- Review WordPress plugin inventory to identify sites running Object Cache 4 everyone versions <= 2.3.2
- Deploy web application firewall rules that flag direct access to plugin cache files
Monitoring Recommendations
- Enable verbose access logging on the WordPress web tier and forward logs to a central analytics platform
- Alert on high-volume, low-diversity requests targeting a single plugin directory from external IPs
- Track plugin version changes across managed WordPress environments to identify unpatched instances
How to Mitigate CVE-2026-54834
Immediate Actions Required
- Identify all WordPress sites running Object Cache 4 everyone <= 2.3.2 and prioritize them for patching
- Update the plugin to the latest patched version released by the maintainer
- Rotate any secrets or credentials that may have been cached and potentially exposed
- Review web server logs for prior anonymous access attempts to plugin resources
Patch Information
Update Object Cache 4 everyone to a version above 2.3.2. Consult the Patchstack Vulnerability Report for the current fixed version and vendor guidance.
Workarounds
- Deactivate and remove the Object Cache 4 everyone plugin until a patched version can be deployed
- Restrict access to plugin directories at the web server level using deny rules for /wp-content/plugins/object-cache-4-everyone/
- Deploy a web application firewall to block unauthenticated requests to plugin cache resources
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
