BaseFortify

Executive Summary

The WordPress Events Manager Plugin, versions 7.3.6 and below, contains a high-priority PHP Object Injection vulnerability. This flaw allows attackers to inject malicious objects through deserialization of untrusted data, potentially leading to code execution, SQL injection, path traversal, denial of service, and other harmful actions if a suitable gadget chain exists.

Exploitation requires a privileged user to perform an action such as clicking a malicious link or submitting a crafted form.

Useful 0 Not Useful 0

Impact Analysis

This vulnerability can have severe impacts including unauthorized code execution, database compromise through SQL injection, unauthorized file access via path traversal, and denial of service attacks. These impacts can lead to website defacement, data theft, service outages, and broader security breaches.

Because the vulnerability can be exploited by tricking a privileged user into interacting with malicious content, it poses a significant risk to websites using the affected plugin versions.

Useful 0 Not Useful 0

Detection Guidance

This vulnerability involves PHP Object Injection in the WordPress Events Manager Plugin versions 7.3.6 and below. Detection typically involves monitoring for suspicious activities such as unexpected code execution, SQL injection attempts, or unusual HTTP requests that may indicate exploitation attempts.

Since exploitation requires a privileged user to perform an action like clicking a malicious link or submitting a form, network detection can focus on identifying unusual POST requests or URLs targeting the Events Manager plugin endpoints.

Specific commands are not provided in the available resources, but general approaches include:

• Using web server logs to search for suspicious POST requests or parameters related to the Events Manager plugin.
• Employing intrusion detection systems (IDS) or web application firewalls (WAF) with rules to detect PHP Object Injection patterns or known exploit payloads.
• Applying the mitigation rule issued by Patchstack to block attacks until the plugin is updated.

Useful 0 Not Useful 0

Mitigation Strategies

The immediate recommended step is to update the WordPress Events Manager Plugin to version 7.3.7 or later, which contains the fix for this vulnerability.

If updating is not possible immediately, users should seek assistance from their hosting provider or web developer to apply temporary mitigations.

Patchstack has issued a mitigation rule that can be applied to block attacks targeting this vulnerability until the plugin is updated.

Useful 0 Not Useful 0