Executive Summary

CVE-2026-25462 is a medium priority Broken Access Control vulnerability in the WordPress avalex plugin versions up to and including 3.1.3.

The issue arises from missing authorization, authentication, or nonce token checks in certain plugin functions, which allows unauthenticated users to perform actions that should be restricted to higher privileged users.

This vulnerability is classified under the OWASP Top 10 category A1: Broken Access Control.

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Impact Analysis

Because the vulnerability allows unauthenticated users to perform privileged actions, it can lead to unauthorized access and control over parts of the affected website.

This can result in data manipulation, unauthorized changes, or other malicious activities on websites using the vulnerable avalex plugin.

The vulnerability is exploitable in mass campaigns targeting many websites regardless of their traffic or popularity, increasing the risk of widespread impact.

Immediate mitigation involves updating the plugin to version 3.1.4 or later, or applying automated mitigation rules provided by Patchstack.

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Detection Guidance

This vulnerability arises from missing authorization, authentication, or nonce token checks in certain plugin functions of the avalex WordPress plugin up to version 3.1.3, allowing unauthenticated users to perform privileged actions.

Detection can involve monitoring for unusual or unauthorized access attempts to the avalex plugin endpoints or functions, especially those that should require higher privileges.

Since the vulnerability requires no prior authentication, network or web server logs can be inspected for suspicious requests targeting the avalex plugin.

Specific commands are not provided in the available resources, but general approaches include using web server log analysis tools (e.g., grep) to search for requests to avalex plugin URLs or unusual POST requests.

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Mitigation Strategies

The immediate mitigation step is to update the avalex WordPress plugin to version 3.1.4 or later, where the vulnerability has been patched.

Until the plugin is updated, applying automated mitigation rules provided by Patchstack to block attacks targeting this vulnerability is recommended.

Users can also enable auto-update features if available or seek assistance from hosting providers or developers to apply the patch promptly.

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Compliance Impact

The vulnerability is a Broken Access Control issue that allows unauthenticated users to perform actions reserved for higher privileged users. Such unauthorized access can lead to exposure or manipulation of sensitive data.

This type of vulnerability can negatively impact compliance with common standards and regulations like GDPR and HIPAA, which require strict access controls and protection of personal and sensitive information.

Failure to properly restrict access could result in unauthorized data access or modification, potentially leading to data breaches and regulatory violations.

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