Executive Summary

CVE-2025-48101 is a high-severity PHP Object Injection vulnerability in the Constant Contact for WordPress Plugin (up to version 4.1.1). It allows unauthenticated attackers to inject malicious PHP objects, which can lead to various attacks such as code injection, SQL injection, path traversal, and denial of service, depending on the presence of a suitable Property Oriented Programming (POP) chain. [1]

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Impact Analysis

This vulnerability can have severe impacts including unauthorized code execution, database compromise through SQL injection, unauthorized file system access via path traversal, and denial of service attacks. These impacts can lead to website defacement, data theft, service disruption, and potentially full site compromise. [1]

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Detection Guidance

This vulnerability may be difficult to detect using standard plugin-based malware scanners, as they can be unreliable for this issue. There are no specific detection commands provided. Users are advised to monitor for unusual PHP object injection attempts and consider professional incident response if compromise is suspected. [1]

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Mitigation Strategies

Immediate mitigation involves applying Patchstack's virtual patch (vPatch) which blocks attacks targeting this vulnerability until an official fix is released. Users should implement this automated virtual patch proactively and seek professional incident response if their sites are compromised. [1]

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