Executive Summary

CVE-2026-42377 is a high-priority Broken Access Control vulnerability in the WordPress SureForms Pro plugin versions up to and including 2.8.0.

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 means attackers can exploit incorrectly configured access control security levels to escalate privileges without proper permissions.

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Impact Analysis

This vulnerability can have significant impacts as it allows unauthorized users to perform privileged actions on affected websites.

• Attackers can exploit this flaw in mass campaigns, targeting thousands of websites regardless of their traffic or popularity.
• It can lead to unauthorized privilege escalation, potentially compromising the integrity, confidentiality, and availability of the affected site.

To mitigate the risk, users must update the SureForms Pro plugin to version 2.8.1 or later, where the vulnerability has been patched.

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Detection Guidance

The CVE-2026-42377 vulnerability is a broken access control issue in the SureForms Pro WordPress plugin versions up to 2.8.0, allowing unauthenticated users to perform privileged actions. Detection involves identifying attempts to exploit missing authorization or nonce token checks in the plugin's functions.

While specific commands are not provided, monitoring web server logs for unusual or unauthorized requests targeting SureForms Pro plugin endpoints, especially those that should require authentication, can help detect exploitation attempts.

Additionally, applying the Patchstack mitigation rule can help detect and block attacks targeting this vulnerability until the plugin is updated.

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Mitigation Strategies

The immediate and recommended mitigation for CVE-2026-42377 is to update the SureForms Pro plugin to version 2.8.1 or later, where the vulnerability has been patched.

Until the update can be applied, users should implement the Patchstack mitigation rule that blocks attacks targeting this vulnerability.

Users are also advised to seek assistance from their hosting provider or web developer to ensure the update and mitigation are properly applied.

Patchstack offers automatic updates for vulnerable plugins to ensure rapid protection, which can be considered as part of the mitigation strategy.

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Compliance Impact

The CVE-2026-42377 vulnerability is a broken access control issue that allows unauthorized users to perform actions reserved for higher-privileged users. Such unauthorized access can lead to data breaches or unauthorized data manipulation.

This kind of vulnerability can negatively impact compliance with common standards and regulations like GDPR and HIPAA, which require strict access controls to protect sensitive personal and health information. Failure to properly restrict access could result in unauthorized disclosure or alteration of protected data, leading to potential regulatory violations and penalties.

Mitigating this vulnerability by updating the SureForms Pro plugin to version 2.8.1 or later is essential to maintain compliance and reduce the risk of unauthorized access.

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Executive Summary

CVE-2026-42377 is a high-priority Broken Access Control vulnerability in the WordPress SureForms Pro plugin versions up to and including 2.8.0.

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 means attackers can exploit incorrectly configured access control security levels to escalate privileges without proper permissions.

Useful 0 Not Useful 0

Impact Analysis

This vulnerability can have significant impacts because it allows unauthorized users to perform privileged actions on affected websites.

• Attackers can exploit this flaw in mass campaigns, targeting thousands of websites regardless of their traffic or popularity.
• It can lead to unauthorized privilege escalation, potentially compromising website integrity, data, and functionality.

The vulnerability has a CVSS severity score of 7.3, indicating a high risk to affected systems.

Mitigation requires updating the SureForms Pro plugin to version 2.8.1 or later, where the issue has been patched.

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Detection Guidance

The CVE-2026-42377 vulnerability is a broken access control issue in the SureForms Pro plugin that allows unauthenticated users to perform privileged actions. Detection typically involves monitoring for unauthorized access attempts or suspicious activity targeting the plugin's functions.

While specific commands are not provided in the available resources, users can check their WordPress plugin versions to identify if they are running SureForms Pro version 2.8.0 or earlier, which are vulnerable.

Network detection could involve inspecting HTTP requests for unusual or unauthorized attempts to access SureForms Pro plugin endpoints without proper authentication.

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Mitigation Strategies

The immediate and recommended mitigation for CVE-2026-42377 is to update the SureForms Pro plugin to version 2.8.1 or later, where the vulnerability has been patched.

Until the update can be applied, users can implement the mitigation rule provided by Patchstack that blocks attacks targeting this vulnerability.

Users are also advised to seek assistance from their hosting provider or web developer to ensure the update and mitigation are properly applied.

Patchstack offers automatic updates for vulnerable plugins to ensure rapid protection, which can be utilized as an additional safeguard.

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