Executive Summary

CVE-2026-25358 is a high-priority PHP Object Injection vulnerability found in the WordPress Meloo Theme versions prior to 2.8.2.

This vulnerability allows attackers to inject malicious objects into the application, which can lead to various attacks such as code injection, SQL injection, path traversal, and denial of service.

Exploitation requires the attacker to have at least subscriber or developer privileges and a suitable PHP Object Injection POP chain.

The issue falls under the OWASP Top 10 category A3: Injection.

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Impact Analysis

If exploited, this vulnerability can allow attackers to perform malicious actions including:

• Code injection, which can lead to unauthorized code execution.
• SQL injection, potentially compromising the database.
• Path traversal attacks, which may expose sensitive files.
• Denial of service, disrupting the availability of the website.

Because of its severity and ease of exploitation, it is expected to be targeted in mass attack campaigns affecting many websites.

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Detection Guidance

The CVE-2026-25358 vulnerability is a PHP Object Injection issue in the WordPress Meloo Theme versions prior to 2.8.2. Detection typically involves identifying if the vulnerable theme version is in use and monitoring for exploitation attempts.

While specific commands are not provided in the resources, common detection methods include scanning your WordPress installation to check the Meloo Theme version and monitoring web server logs for suspicious requests that may indicate PHP Object Injection attempts.

• Check the Meloo Theme version installed on your WordPress site to confirm if it is older than 2.8.2.
• Monitor web server logs for unusual POST requests or payloads that could be attempts to exploit PHP Object Injection.
• Use vulnerability scanning tools or Patchstack's automated tools to detect and monitor this vulnerability.

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Mitigation Strategies

The primary and most effective mitigation step is to update the Meloo Theme to version 2.8.2 or later, which contains the patch resolving this vulnerability.

Until the update can be applied, it is recommended to implement mitigation rules provided by Patchstack to block attacks exploiting this flaw.

• Update the Meloo Theme to version 2.8.2 or newer immediately.
• Apply Patchstack's mitigation rules to block exploitation attempts.
• Limit user privileges to prevent unauthorized exploitation, as the vulnerability requires at least subscriber or developer privileges.
• Use automated tools from Patchstack for ongoing vulnerability mitigation and website protection.

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Compliance Impact

The provided information does not specify how the CVE-2026-25358 vulnerability directly affects compliance with common standards and regulations such as GDPR or HIPAA.

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