CVE-2025-26730: Macro Calculator Information Disclosure Flaw

CVE-2025-26730 Overview

CVE-2025-26730 is an Exposure of Sensitive System Information to an Unauthorized Control Sphere vulnerability affecting the WordPress plugin "Macro Calculator with Admin Email Optin & Data." This information disclosure vulnerability (CWE-497) allows unauthenticated remote attackers to access sensitive system information that should be restricted to authorized users only.

Critical Impact

Unauthorized attackers can remotely access sensitive system information without authentication, potentially exposing admin email configurations and internal system data that could be leveraged for further attacks.

Affected Products

• Macro Calculator with Admin Email Optin & Data plugin version 1.0 and earlier
• WordPress installations running the affected plugin

Discovery Timeline

• 2025-04-15 - CVE CVE-2025-26730 published to NVD
• 2026-04-28 - Last updated in NVD database

Technical Details for CVE-2025-26730

Vulnerability Analysis

This vulnerability stems from improper access controls within the Macro Calculator with Admin Email Optin & Data WordPress plugin. The plugin fails to adequately protect sensitive system information, allowing unauthorized users to access data that should be restricted to administrative contexts. The flaw enables network-based attacks that require no authentication or user interaction, making exploitation straightforward for remote attackers.

The vulnerability is classified under CWE-497 (Exposure of Sensitive System Information to an Unauthorized Control Sphere), indicating that the plugin inadvertently exposes internal system details, configuration data, or admin-related information to unauthorized parties. This type of vulnerability is particularly concerning in WordPress environments where plugins often handle sensitive user data and administrative configurations.

Root Cause

The root cause of this vulnerability lies in insufficient access control mechanisms within the plugin's codebase. The plugin does not properly validate user authorization before exposing sensitive system information. This architectural flaw allows any unauthenticated user to retrieve information that should only be accessible to authenticated administrators, violating the principle of least privilege.

Attack Vector

The attack vector is network-based and requires no privileges or user interaction. An attacker can exploit this vulnerability by sending crafted requests to the vulnerable WordPress installation. The attack complexity is low, meaning the vulnerability can be reliably exploited without requiring specialized conditions or circumventing additional security measures.

The vulnerability specifically affects confidentiality, allowing attackers to read sensitive information without the ability to modify data or disrupt service availability. Attackers could potentially use the exposed information to:

• Enumerate system configurations and internal details
• Harvest admin email addresses for phishing or social engineering attacks
• Gather reconnaissance data for more targeted attacks against the WordPress installation

For technical details regarding the exploitation methodology, refer to the Patchstack WordPress Vulnerability Report.

Detection Methods for CVE-2025-26730

Indicators of Compromise

• Unusual requests to plugin endpoints from unauthenticated sources
• Access log entries showing repeated queries to Macro Calculator plugin resources from external IP addresses
• Unexpected data exfiltration patterns targeting WordPress plugin directories
• Anomalous traffic patterns indicating automated scanning or enumeration of WordPress plugins

Detection Strategies

• Monitor WordPress access logs for requests to the macro-admin-email-data-optin-calculator plugin path from unauthenticated users
• Implement web application firewall (WAF) rules to detect and block suspicious queries targeting WordPress plugin endpoints
• Deploy intrusion detection signatures to identify reconnaissance activity against WordPress installations
• Use SentinelOne Singularity Platform to detect and correlate suspicious network activity targeting vulnerable WordPress plugins

Monitoring Recommendations

• Enable detailed logging for all WordPress plugin activity and API requests
• Configure alerts for access attempts to administrative plugin endpoints from non-authenticated sessions
• Implement real-time monitoring of outbound data flows from the WordPress server for potential data exfiltration
• Review WordPress security logs regularly for signs of exploitation attempts

How to Mitigate CVE-2025-26730

Immediate Actions Required

• Deactivate and remove the Macro Calculator with Admin Email Optin & Data plugin immediately if it is not essential to site operations
• Audit WordPress installations to identify all instances running the vulnerable plugin version 1.0 or earlier
• Review server access logs to determine if the vulnerability has already been exploited
• Implement network-level access controls to restrict access to WordPress admin areas

Patch Information

At the time of publication, no official patch has been identified for this vulnerability. Organizations using the Macro Calculator with Admin Email Optin & Data plugin should consider removing the plugin entirely or replacing it with an alternative solution that does not contain this vulnerability. Monitor the Patchstack WordPress Vulnerability Report for updates regarding patches or official remediation guidance.

Workarounds

• Implement web application firewall (WAF) rules to block unauthenticated access to the plugin's endpoints
• Restrict access to WordPress administrative functions using IP-based allow lists
• Consider using a security plugin to add additional access control layers around sensitive plugin functionality
• Disable the plugin entirely until a security patch becomes available

# WordPress CLI command to deactivate the vulnerable plugin
wp plugin deactivate macro-admin-email-data-optin-calculator --path=/var/www/html/wordpress

# Verify plugin status
wp plugin status macro-admin-email-data-optin-calculator --path=/var/www/html/wordpress