Executive Summary

CVE-2026-22440 is a medium priority Cross Site Scripting (XSS) vulnerability affecting the WordPress Thecs Theme versions up to and including 1.4.7.

This vulnerability allows an attacker to inject malicious scripts—such as redirects, advertisements, or other HTML payloads—into a website. These scripts execute when visitors access the compromised site.

It is classified under the OWASP Top 10 category A3: Injection.

Exploitation requires user interaction by a privileged user, such as clicking a malicious link, visiting a crafted page, or submitting a form.

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Impact Analysis

This vulnerability can lead to the execution of malicious scripts on your website, which may result in unauthorized redirects, display of unwanted advertisements, or other harmful HTML payloads.

Such exploitation can compromise the integrity and trustworthiness of your website, potentially harming your users and damaging your reputation.

Since exploitation requires user interaction by a privileged user, attackers might trick such users into triggering the malicious scripts.

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Compliance Impact

I don't know

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Detection Guidance

[{'type': 'paragraph', 'content': 'This vulnerability is a Reflected Cross Site Scripting (XSS) issue affecting the WordPress Thecs Theme up to version 1.4.7. Detection typically involves identifying malicious script injections in web requests or responses.'}, {'type': 'paragraph', 'content': 'To detect this vulnerability on your system or network, you can monitor HTTP requests and responses for suspicious input that is reflected without proper neutralization. Using web application security scanners or manual testing with crafted URLs containing typical XSS payloads (e.g., <script>alert(1)</script>) can help identify the issue.'}, {'type': 'paragraph', 'content': 'Example commands to test for reflected XSS include using curl or browser-based tools to send requests with payloads and observe if they are reflected in the response unescaped.'}, {'type': 'list_item', 'content': "curl -i 'http://your-site.com/page?param=<script>alert(1)</script>'"}, {'type': 'list_item', 'content': 'Use browser developer tools to inspect responses for injected scripts after submitting crafted URLs or forms.'}, {'type': 'list_item', 'content': 'Run automated scanners like OWASP ZAP or Burp Suite to detect reflected XSS vulnerabilities.'}] [1]

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Mitigation Strategies

Since no official patch is currently available for this vulnerability, immediate mitigation involves applying available workaround measures to block attacks.

Patchstack has issued a mitigation rule to block attacks targeting this flaw until an official patch is released and can be safely applied.

• Implement Web Application Firewall (WAF) rules to detect and block malicious payloads targeting the reflected XSS vulnerability.
• Educate privileged users to avoid clicking on suspicious links or submitting untrusted forms that could trigger the vulnerability.
• Monitor web traffic for unusual activity and apply input validation and output encoding where possible.

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