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Executive Summary

CVE-2026-57745 is a Cross Site Scripting (XSS) vulnerability found in the WordPress RT-Theme 18 | Extensions Plugin, specifically in versions 2.5 and below.

This vulnerability occurs due to improper neutralization of input during web page generation, allowing an attacker to inject malicious scripts into web pages.

Exploitation requires user interaction, such as clicking a malicious link or visiting a crafted page, and can be performed by an unauthenticated attacker.

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Impact Analysis

Successful exploitation of this vulnerability allows attackers to inject harmful scripts that execute when visitors access the affected site.

• Execution of malicious redirects
• Display of unwanted advertisements
• Potential compromise of user data and site integrity

Because the vulnerability has a CVSS score of 7.1, it represents a moderate risk and could be used in mass campaigns targeting many websites.

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Detection Guidance

This vulnerability is a Reflected Cross Site Scripting (XSS) issue affecting the RT-Theme 18 | Extensions Plugin versions 2.5 and below. Detection typically involves monitoring for suspicious HTTP requests containing malicious scripts or payloads that attempt to exploit the XSS flaw.

Common detection methods include analyzing web server logs for unusual query parameters or payloads, and using web vulnerability scanners that test for reflected XSS vulnerabilities by injecting test scripts into input fields or URL parameters.

Specific commands are not provided in the available resources, but you can use tools like curl or wget to manually test for reflected XSS by sending crafted requests and observing responses. For example, you might use a command like:

• curl -i "http://your-target-site.com/page?param=<script>alert('XSS')</script>"

If the response contains the injected script without proper neutralization, it indicates the presence of the vulnerability.

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Mitigation Strategies

Immediate mitigation steps include applying any available updates to the RT-Theme 18 | Extensions Plugin to a version higher than 2.5 once released.

Since an official patch is not yet available, it is advised to implement the mitigation rule provided by Patchstack to block attacks exploiting this vulnerability.

Additional steps include seeking assistance from your hosting provider or a developer to apply temporary security measures such as web application firewall (WAF) rules or input sanitization to prevent malicious script injection.

Using automated mitigation solutions offered by Patchstack can also enhance security until an official fix is released.

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