Compliance Impact

The vulnerability allows unauthenticated attackers to escalate their privileges and potentially gain full control of the affected website. This could lead to unauthorized access to sensitive data, which may impact compliance with data protection regulations such as GDPR and HIPAA.

Because the flaw falls under OWASP Top 10 category A7 (Identification and Authentication Failures), it indicates weaknesses in authentication mechanisms that are critical for protecting personal and sensitive information required by these standards.

Failure to address this vulnerability promptly could result in breaches of confidentiality, integrity, and availability of data, thereby violating compliance requirements and potentially leading to legal and financial consequences.

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Detection Guidance

This vulnerability affects the WordPress Contest Gallery Pro plugin versions 29.0.1 and earlier. To detect if your system is vulnerable, you need to check the installed version of the Contest Gallery Pro plugin on your WordPress site.

• Log in to your WordPress admin dashboard and navigate to the Plugins section to verify the version of Contest Gallery Pro.
• Alternatively, you can check the plugin version via command line by accessing your WordPress installation directory and running a command to read the plugin's main file header, for example:
• grep 'Version' wp-content/plugins/contest-gallery-pro/contest-gallery-pro.php

If the version is 29.0.1 or earlier, your site is vulnerable to this privilege escalation issue.

There are no specific network detection commands or signatures provided for this vulnerability in the available resources.

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Executive Summary

CVE-2026-42680 is a high-priority privilege escalation vulnerability in the WordPress Contest Gallery Pro plugin versions 29.0.1 and earlier.

This flaw allows unauthenticated attackers to escalate their privileges, potentially gaining full control of the affected website.

The vulnerability is categorized under OWASP Top 10 A7 (Identification and Authentication Failures), indicating a failure in proper privilege assignment and authentication controls.

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Impact Analysis

An attacker exploiting this vulnerability can gain unauthorized full control over your website.

This can lead to severe consequences including unauthorized data access, modification, deletion, or disruption of website services.

Given the high CVSS score of 9.8, the vulnerability is highly dangerous and likely to be exploited in widespread attacks targeting thousands of websites.

Immediate mitigation is necessary by updating the plugin to version 29.0.2 or later or applying provided mitigation rules.

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Mitigation Strategies

To mitigate the CVE-2026-42680 vulnerability in the Contest Gallery Pro plugin, you should immediately update the plugin to version 29.0.2 or later.

If you are unable to update the plugin directly, you can apply a mitigation rule provided by Patchstack or seek assistance from your hosting provider.

Taking these steps will help prevent unauthenticated attackers from escalating their privileges and gaining full control of your website.

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