Cross-Site Scripting in Jetpack 11.4 Contact Form Module

Executive Summary

CVE-2023-54332 is a cross-site scripting (XSS) vulnerability in Jetpack version 11.4, specifically in the contact form module. It occurs because the post_id parameter does not properly sanitize user input, allowing attackers to inject malicious JavaScript code. When a victim interacts with a crafted URL containing this malicious script, the script executes in their browser, potentially exposing sensitive information or performing unauthorized actions. [1, 3]

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Impact Analysis

This vulnerability can impact you by allowing attackers to execute arbitrary JavaScript in the browsers of users who visit the affected contact form page with a maliciously crafted URL. This can lead to theft of sensitive information such as cookies, session hijacking, or other malicious actions performed in the context of the victim's browser session. [1, 3]

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Detection Guidance

This vulnerability can be detected by testing the contact form module of Jetpack version 11.4 for reflected cross-site scripting (XSS) via the post_id parameter. A practical detection method is to craft and visit a URL similar to: http://localhost/modules/contact-form/grunion-form-view.php?post_id=<script>alert(document.cookie)</script> and observe if the script executes in the browser. This indicates the presence of the vulnerability. No specific network commands are provided, but manual testing of the URL with the malicious payload is suggested. [1, 3]

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Mitigation Strategies

Immediate mitigation steps include updating the Jetpack plugin to a version later than 11.4 where the vulnerability is fixed. Additionally, enabling Jetpack's security features such as the Web Application Firewall (WAF) can help block malicious traffic exploiting this vulnerability. As a temporary measure, avoid interacting with suspicious URLs containing the post_id parameter with script payloads and consider disabling the contact form module until a patch is applied. [2, 3]

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