CVE-2023-45772 in Scribit Proofreading Plugin
Summary
by MITRE • 10/25/2023
Unauth. Reflected Cross-Site Scripting (XSS) vulnerability in Scribit Proofreading plugin <= 1.0.11 versions.
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Analysis
by VulDB Data Team • 11/16/2023
The Scribit Proofreading plugin for WordPress contains an unauthorized reflected cross-site scripting vulnerability that affects versions 1.0.11 and earlier. This flaw resides in the plugin's handling of user-supplied input within the application's response, specifically within the query parameters used for proofreading functionality. The vulnerability allows remote attackers to inject malicious scripts into web pages viewed by other users without requiring authentication or authorization. The reflected nature of this XSS means that the malicious script is reflected off the web server back to the victim's browser, typically through a crafted URL that includes the malicious payload in one of the request parameters.
The technical implementation of this vulnerability stems from insufficient input validation and output sanitization within the plugin's core functionality. When users access the proofreading features, the application fails to properly escape or filter user-provided data before incorporating it into dynamic web page content. This lack of proper sanitization creates an opening for attackers to inject JavaScript code that executes in the context of other users' browsers. The vulnerability manifests when malicious input is passed through parameters such as GET requests, which are then reflected back to the user without appropriate encoding or validation measures.
The operational impact of this vulnerability extends beyond simple script execution and represents a significant security risk for WordPress sites utilizing the affected plugin. Attackers can leverage this weakness to perform session hijacking by stealing cookies, redirect users to malicious websites, deface the site content, or even escalate privileges if users have administrative access. The reflected nature of the attack means that exploitation typically requires social engineering to convince victims to click on a malicious link, making it particularly dangerous in phishing campaigns. Additionally, since this affects a widely used plugin, the potential attack surface is extensive across numerous WordPress installations.
Mitigation strategies for this vulnerability should include immediate patching to version 1.0.12 or later where the XSS protections have been implemented. Administrators should also implement proper input validation and output encoding mechanisms at both the application and server levels to prevent similar issues in other components. Web Application Firewalls can provide additional protection by filtering suspicious request patterns, though this represents a defensive measure rather than a complete solution. Organizations using the affected plugin should conduct comprehensive security assessments of their WordPress installations to identify any other potential vulnerabilities in third-party plugins or themes that might present similar risks. The vulnerability aligns with CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') and maps to ATT&CK technique T1566.001 - Phishing: Spearphishing Attachment, as attackers can leverage this weakness to deliver malicious payloads through crafted links that appear legitimate to end users.