CVE-2024-35640 in Safety Exit Plugin
Summary
by MITRE • 06/03/2024
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Tomas Cordero Safety Exit allows Stored XSS.This issue affects Safety Exit: from n/a through 1.7.0.
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Analysis
by VulDB Data Team • 03/26/2025
This vulnerability represents a critical cross-site scripting flaw in the Tomas Cordero Safety Exit plugin, specifically categorized as a stored XSS vulnerability that enables persistent malicious script execution across user sessions. The issue stems from inadequate input sanitization during web page generation processes, where user-supplied data is improperly handled and directly embedded into web responses without proper neutralization. The vulnerability affects all versions from the initial release through 1.7.0, indicating a long-standing flaw that has remained unaddressed in the plugin's codebase. This type of vulnerability falls under CWE-79, which specifically addresses Cross-Site Scripting flaws in web applications, and aligns with ATT&CK technique T1588.002 for the development of malicious content that can be executed in user browsers. The stored nature of this XSS vulnerability means that malicious scripts are permanently stored on the server and executed whenever affected users access the compromised pages, making it particularly dangerous for persistent attacks.
The technical implementation of this flaw likely occurs during the processing of user input through form submissions, comment fields, or other interactive elements within the Safety Exit plugin interface. When users submit content that contains malicious script tags, these inputs are not properly escaped or filtered before being rendered in web pages, allowing attackers to inject persistent scripts that execute in the context of other users' browsers. This creates a vector for session hijacking, credential theft, and other malicious activities that can compromise user accounts and data. The vulnerability's impact extends beyond simple script execution as it can enable attackers to perform actions on behalf of authenticated users, potentially leading to full system compromise. The fact that this affects the plugin's web page generation process suggests that the sanitization occurs at the output rendering stage rather than the input validation stage, which is a common oversight in web application security implementations.
The operational impact of this vulnerability creates significant risk for organizations using the Safety Exit plugin, as it allows attackers to establish persistent footholds within their web applications. Once exploited, malicious scripts can harvest cookies, session tokens, and other sensitive information from user browsers, potentially leading to unauthorized access to protected resources. The stored nature means that even users who visit pages after the initial attack remain vulnerable, creating a continuous threat vector that can persist for extended periods. Security teams face challenges in detecting and mitigating this vulnerability as it operates at the application layer, requiring careful monitoring of user-generated content and proper input validation implementation. The vulnerability's presence in versions through 1.7.0 indicates that the plugin developers may not have adequately addressed security concerns in their development lifecycle, potentially exposing users to ongoing risks.
Mitigation strategies for this vulnerability should prioritize immediate patching of the Safety Exit plugin to version 1.7.1 or later, which should contain the necessary input sanitization fixes. Organizations should implement comprehensive input validation and output encoding mechanisms that prevent script injection at all points where user data is processed. This includes implementing proper HTML escaping for all dynamic content, utilizing Content Security Policy headers to limit script execution, and deploying web application firewalls that can detect and block malicious input patterns. Security teams should conduct thorough audits of all user input handling within the plugin and related applications, implementing automated testing procedures to identify similar vulnerabilities. Additionally, user education regarding the risks of visiting compromised sites and the importance of maintaining updated software versions should be emphasized. The vulnerability's classification as a stored XSS attack underscores the need for regular security assessments and the implementation of defense-in-depth strategies that protect against multiple attack vectors simultaneously.