Mitigation Strategies

To mitigate the CVE-2026-39588 vulnerability, you should update the NM Gift Registry and Wishlist Lite WordPress plugin to version 5.14 or later, as this version contains the patch for the broken access control issue.

Additionally, consider using mitigation services such as Patchstack's auto-updates for vulnerable plugins to ensure timely patching and reduce the risk of exploitation.

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Executive Summary

CVE-2026-39588 is a broken access control vulnerability in the WordPress NM Gift Registry and Wishlist Lite Plugin versions up to and including 5.13.

This issue arises from missing authorization, authentication, or nonce token checks in certain functions, allowing unauthenticated users to perform actions reserved for higher-privileged users.

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

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Impact Analysis

The vulnerability allows unauthenticated users to perform actions that should be restricted to higher-privileged users, potentially compromising the security of the affected website.

Although it has a low severity impact with a CVSS score of 5.3 and is unlikely to be exploited with significant impact, it can be used in mass-exploit campaigns targeting many websites indiscriminately.

Exploitation requires no privileges, emphasizing the importance of timely patching to prevent unauthorized access.

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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 potentially lead to exposure or manipulation of sensitive data.

While the CVE description and resources do not explicitly mention compliance with standards like GDPR or HIPAA, broken access control vulnerabilities generally pose risks to data confidentiality and integrity, which are critical components of these regulations.

Failure to properly restrict access could result in unauthorized data access or modification, potentially leading to non-compliance with data protection requirements under regulations such as GDPR and HIPAA.

Therefore, organizations using affected versions of the plugin should promptly apply patches to mitigate risks that could impact regulatory compliance.

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Detection Guidance

This vulnerability is a broken access control issue in the NM Gift Registry and Wishlist Lite WordPress plugin up to version 5.13, allowing unauthenticated users to perform privileged actions.

Detection typically involves checking the plugin version installed on your WordPress site and verifying if it is vulnerable (version 5.13 or earlier).

Since the vulnerability exploits missing authorization checks, one way to detect it is by attempting to access or perform actions that should require authentication or higher privileges without logging in.

• Check the plugin version via WordPress admin dashboard or by running a command to list installed plugins and their versions, e.g., using WP-CLI: wp plugin list
• Attempt to access plugin-specific endpoints or functions without authentication to see if unauthorized actions are possible (this requires knowledge of the plugin's endpoints).
• Monitor web server logs for suspicious unauthenticated requests targeting the NM Gift Registry and Wishlist Lite plugin paths or parameters.

No specific detection commands or scripts are provided in the available resources.

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