CVE-2026-25389: EventPrime Information Disclosure Flaw

CVE-2026-25389 Overview

CVE-2026-25389 is a Sensitive Data Exposure vulnerability affecting the EventPrime Event Calendar Management plugin for WordPress developed by Metagauss. The vulnerability allows unauthorized actors to retrieve embedded sensitive system information from affected WordPress installations, potentially exposing confidential data to malicious parties.

Critical Impact

Unauthorized users can access sensitive system information embedded within the EventPrime plugin, potentially leading to further attacks or data compromise.

Affected Products

• Metagauss EventPrime Event Calendar Management plugin versions up to and including 4.2.8.3
• WordPress sites running vulnerable versions of the EventPrime plugin

Discovery Timeline

• 2026-02-19 - CVE-2026-25389 published to NVD
• 2026-02-19 - Last updated in NVD database

Technical Details for CVE-2026-25389

Vulnerability Analysis

This vulnerability is classified under CWE-497 (Exposure of Sensitive System Information to an Unauthorized Control Sphere). The flaw allows attackers to retrieve embedded sensitive data from WordPress installations running the EventPrime plugin without requiring authentication or special privileges.

The vulnerability exists in how the EventPrime plugin handles and exposes system information. Sensitive data that should be protected and accessible only to authorized administrators is inadvertently made available to unauthorized parties through improper access controls or information disclosure mechanisms within the plugin.

Root Cause

The root cause stems from improper information handling within the EventPrime plugin. The plugin fails to adequately protect sensitive system information, allowing this data to be exposed to unauthorized control spheres. This could include configuration details, internal paths, database information, or other system-level data that should remain confidential.

Attack Vector

An attacker can exploit this vulnerability remotely by targeting WordPress websites running vulnerable versions of the EventPrime plugin. The attack does not require authentication, making it accessible to any remote attacker who can reach the affected WordPress installation. By crafting specific requests or accessing certain plugin endpoints, attackers can retrieve sensitive embedded data that the plugin inadvertently exposes.

For detailed technical information about the exploitation mechanism, refer to the Patchstack Vulnerability Report.

Detection Methods for CVE-2026-25389

Indicators of Compromise

• Unusual access patterns to EventPrime plugin endpoints or files
• Unexpected requests targeting plugin configuration or system information endpoints
• Log entries showing repeated queries for plugin-related resources from unknown sources
• Evidence of enumeration attempts against WordPress plugin directories

Detection Strategies

• Monitor web server access logs for suspicious requests targeting /wp-content/plugins/eventprime-event-calendar-management/ paths
• Implement Web Application Firewall (WAF) rules to detect and block information disclosure attempts
• Use WordPress security plugins to audit access to sensitive plugin resources
• Enable detailed logging for the EventPrime plugin to track unusual activity

Monitoring Recommendations

• Configure alerting for abnormal access patterns to EventPrime plugin resources
• Regularly review WordPress audit logs for unauthorized access attempts
• Implement intrusion detection systems (IDS) to monitor for known exploitation patterns
• Conduct periodic security assessments of installed WordPress plugins

How to Mitigate CVE-2026-25389

Immediate Actions Required

• Update the EventPrime plugin to a version newer than 4.2.8.3 as soon as a patched version becomes available
• Audit WordPress installations to identify all sites running vulnerable versions of EventPrime
• Review access logs for any signs of exploitation attempts
• Consider temporarily disabling the EventPrime plugin on critical sites until a patch is available

Patch Information

Check for updates to the EventPrime Event Calendar Management plugin through the WordPress plugin repository or the vendor's official channels. Monitor the Patchstack Vulnerability Report for patch availability and additional guidance.

Workarounds

• Restrict access to the WordPress admin panel and plugin directories using server-level access controls
• Implement a Web Application Firewall (WAF) to filter malicious requests targeting the plugin
• Disable or remove the EventPrime plugin if it is not essential until a patched version is released
• Use WordPress security plugins like Wordfence or Sucuri to add additional protection layers

# Example: Restrict access to EventPrime plugin directory via .htaccess
# Add to /wp-content/plugins/eventprime-event-calendar-management/.htaccess

<Files "*.php">
  Order Deny,Allow
  Deny from all
  Allow from 127.0.0.1
</Files>