Deserialization Object Injection in Travelicious Plugin

Executive Summary

CVE-2025-67997 is a high-priority PHP Object Injection vulnerability affecting the WordPress Travelicious Theme versions prior to 1.6.7.

This vulnerability allows unauthenticated attackers to perform PHP Object Injection, which means they can inject malicious objects into the application.

If a suitable Property Oriented Programming (POP) chain is available, this can lead to severe impacts such as code injection, SQL injection, path traversal, denial of service, and other critical issues.

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

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Impact Analysis

This vulnerability can have severe impacts including:

• Code injection, allowing attackers to execute arbitrary code on the affected system.
• SQL injection, potentially compromising the database and exposing sensitive data.
• Path traversal, which can allow attackers to access files and directories outside the intended scope.
• Denial of service, disrupting the availability of the affected website.

The vulnerability requires no privileges to exploit, making it a high-severity threat.

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Compliance Impact

I don't know

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Detection Guidance

This vulnerability affects the WordPress Travelicious Theme versions prior to 1.6.7 and involves PHP Object Injection. Detection typically involves monitoring for exploitation attempts targeting this theme.

While specific commands are not provided in the available resources, common detection methods include checking for unusual HTTP requests containing serialized PHP objects or payloads attempting object injection.

Network or system administrators can monitor web server logs for suspicious POST or GET requests targeting the Travelicious theme files, especially those containing serialized data or unusual parameters.

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Mitigation Strategies

The primary and recommended mitigation is to update the Travelicious Theme to version 1.6.7 or later, which contains the patch for this vulnerability.

Until the update can be applied, Patchstack provides an immediate mitigation rule that can be used to block attacks targeting this vulnerability, enabling rapid protection for affected WordPress sites.

Since the vulnerability requires no privileges to exploit and is high severity, applying these mitigations promptly is critical to prevent potential code injection, SQL injection, path traversal, denial of service, and other severe impacts.

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