CVE-2022-0253 in livehelperchat
Summary
by MITRE • 01/17/2022
livehelperchat is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
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Analysis
by VulDB Data Team • 01/20/2022
The vulnerability identified as CVE-2022-0253 affects livehelperchat, a popular open-source live chat solution used by numerous organizations for customer support and communication. This particular flaw represents a classic cross-site scripting vulnerability that arises from improper input sanitization during web page generation processes. The issue stems from the application's failure to adequately neutralize user-supplied input before incorporating it into dynamically generated web content, creating a persistent security weakness that can be exploited by malicious actors.
This vulnerability specifically manifests when the livehelperchat application processes user input through its web interface without sufficient validation or sanitization measures. The technical flaw falls under the Common Weakness Enumeration category CWE-79, which defines improper neutralization of input during web page generation as a critical weakness in web applications. The vulnerability occurs at the point where user-provided data enters the application's processing pipeline and subsequently gets rendered in HTML output without proper escaping or encoding mechanisms. Attackers can exploit this weakness by injecting malicious scripts into input fields that are then executed in the context of other users' browsers when they view the affected content.
The operational impact of CVE-2022-0253 extends beyond simple data theft or session hijacking, as it can enable attackers to perform a wide range of malicious activities through the compromised chat interface. Successful exploitation allows threat actors to execute arbitrary JavaScript code in the browsers of unsuspecting users, potentially leading to complete session compromise, credential theft, or redirection to malicious websites. The vulnerability is particularly concerning in enterprise environments where livehelperchat may be used for sensitive customer communications, as it could enable attackers to intercept confidential information or manipulate the chat interface to deliver phishing content. The attack vector is typically initiated through web-based input fields within the chat application, making it accessible to attackers with minimal technical expertise and no privileged access to the system.
Mitigation strategies for CVE-2022-0253 should focus on implementing comprehensive input validation and output encoding mechanisms throughout the application's codebase. Organizations should immediately apply the vendor-provided patches or updates that address this specific vulnerability, while also implementing proper content security policies to prevent script execution in the browser context. The recommended approach involves sanitizing all user inputs using established encoding techniques such as HTML entity encoding for output rendering, implementing strict input validation rules, and employing a whitelist-based approach for acceptable input characters. Additionally, organizations should consider implementing web application firewalls to detect and block suspicious input patterns, while also conducting regular security assessments to identify similar vulnerabilities in other components of their web infrastructure. This vulnerability aligns with the ATT&CK framework's technique T1531 which focuses on establishing persistence through web shells and malicious code injection, highlighting the importance of proactive security measures to prevent exploitation of such weaknesses.