Insecure Password Reset in Eventer WordPress Plugin

Executive Summary

The Eventer plugin for WordPress has a vulnerability in its password reset mechanism in all versions up to 4.4.2. When a user requests a password reset, the plugin stores the reset key in plaintext in the user meta field called `eventer_verification_code`. This plaintext key can be used with the plugin's custom reset action to set a new password for any user.

If combined with another vulnerability like SQL Injection (CVE-2026-9700), an attacker who is not authenticated can extract this plaintext reset key and take over any user account, including administrator accounts.

Note that this password reset function vulnerability only applies to PHP versions up to 7.4.

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Detection Guidance

This vulnerability can be detected by checking for the presence of the Eventer plugin version 4.4.2 or earlier installed on your WordPress system.

Additionally, you can inspect the WordPress database's wp_usermeta table for the presence of the plaintext password reset keys stored in the eventer_verification_code user meta field.

A possible command to detect the vulnerable plugin version via WP-CLI is:

• wp plugin list --status=active | grep eventer

To check the database for the plaintext reset keys, you can run a SQL query like:

• SELECT user_id, meta_value FROM wp_usermeta WHERE meta_key = 'eventer_verification_code';

Monitoring network traffic for suspicious password reset requests or unusual activity related to the Eventer plugin's reset mechanism may also help detect exploitation attempts.

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Mitigation Strategies

The immediate mitigation step is to update the Eventer plugin to a version later than 4.4.2 where this vulnerability is fixed.

If an update is not immediately possible, consider disabling the password reset functionality of the Eventer plugin or the plugin itself until a patch is applied.

Additionally, review and secure your WordPress installation by limiting access to the database and monitoring for suspicious activity.

Ensure your PHP version is above 7.4, as the password reset function vulnerability only works up to PHP 7.4.

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Impact Analysis

This vulnerability can allow an unauthenticated attacker to take over any user account on a WordPress site using the Eventer plugin, including administrator accounts.

By exploiting the insecure password reset mechanism and potentially combining it with an SQL Injection vulnerability, attackers can reset passwords without authorization, leading to full account compromise.

Such an account takeover can result in loss of control over the website, data breaches, unauthorized changes, and potential further exploitation.

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Compliance Impact

This vulnerability involves the storage of plaintext password reset keys in the user meta field, which can be exploited to take over user accounts, including administrators. Such exposure of sensitive authentication data can lead to unauthorized access to personal and protected information.

Storing sensitive data like password reset keys in plaintext and the potential for unauthorized account takeover may violate data protection requirements under standards such as GDPR and HIPAA, which mandate appropriate safeguards to protect personal and health information.

Therefore, this vulnerability could negatively impact compliance with these regulations by failing to ensure confidentiality and integrity of user credentials and personal data.

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