CVE-2026-14812

Deferred Deferred - Pending Action

Unauthenticated Backdoor in Premium SEO WordPress Plugin

Publication date: 2026-08-06

Last updated on: 2026-08-26

Assigner: WPScan

Description

The Premium SEO WordPress plugin is malicious: it ships an unauthenticated backdoor that creates a hidden administrator account and, in some builds, also enables remote code execution, server-side request forgery and arbitrary front-end script/content injection, giving an unauthenticated attacker full control of the affected site.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-06

Last Modified

2026-08-26

Generated

2026-08-27

AI Q&A

2026-08-07

EPSS Evaluated

2026-08-26

NVD

CVE-2026-14812

Affected Vendors & Products

Vendor	Product	Version / Range
premium_seo	premium_seo	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-912	The product contains functionality that is not documented, not part of the specification, and not accessible through an interface or command sequence that is obvious to the product's users or administrators.

Attack-Flow Graph

Executive Summary

This vulnerability affects the Premium SEO WordPress plugin, which contains a hidden backdoor allowing unauthenticated attackers to create administrator accounts and gain full control of the website. It may also enable remote code execution, server-side request forgery, and arbitrary script or content injection.

Detection Guidance

Check for unauthorized administrator accounts in WordPress by inspecting user roles via the WordPress dashboard or database. Look for suspicious files in the plugin directory, especially under 'premium_seo'. Use commands like 'find /path/to/wordpress -type f -name "*.php" -exec grep -l "eval(base64_decode" {} \;' to detect obfuscated code.

Impact Analysis

An attacker could exploit this to take over your WordPress site, steal data, inject malicious content, or use your server for further attacks. Since it requires no authentication, any visitor could potentially compromise your site.

Compliance Impact

This vulnerability could lead to unauthorized access and data breaches, violating GDPR and HIPAA requirements for data protection and access control. Organizations may face legal penalties and reputational damage if exploited.

Mitigation Strategies

Immediately uninstall the Premium SEO WordPress plugin from all affected systems. Remove any hidden administrator accounts created by the plugin. Check for signs of unauthorized access or modifications to your site. Ensure all WordPress installations and plugins are updated to the latest versions.

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