CVE-2024-51617 in Clyp Plugin
Summary
by MITRE • 11/19/2024
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Rami Yushuvaev Clyp allows Stored XSS.This issue affects Clyp: from n/a through 1.3.
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Analysis
by VulDB Data Team • 02/25/2025
The vulnerability identified as CVE-2024-51617 represents a critical cross-site scripting flaw in the Clyp application developed by Rami Yushuvaev. This stored XSS vulnerability occurs during the web page generation process when input data is not properly sanitized or neutralized before being rendered in web pages. The flaw allows attackers to inject malicious scripts that persist in the application's database and execute whenever users view affected content, creating a persistent threat vector that can compromise user sessions and access credentials. The vulnerability affects all versions of Clyp from the initial release through version 1.3, indicating a long-standing issue that has not been addressed in the application's security architecture.
The technical implementation of this vulnerability stems from inadequate input validation and output encoding mechanisms within the application's web page generation pipeline. When users submit content through the Clyp interface, the application fails to properly sanitize user-supplied data before storing it in the database or rendering it in subsequent web responses. This improper neutralization creates an environment where malicious scripts can be injected and stored, waiting for unsuspecting users to view the compromised content. The stored nature of this XSS vulnerability means that the malicious payloads remain active even after the initial injection, making it particularly dangerous for persistent attacks. This flaw aligns with CWE-79, which specifically addresses cross-site scripting vulnerabilities where input data is not properly sanitized before being rendered in web pages.
The operational impact of CVE-2024-51617 extends beyond simple script execution, potentially enabling attackers to perform session hijacking, steal user credentials, redirect users to malicious sites, or even modify application functionality. An attacker could inject scripts that capture user input, redirect users to phishing sites, or manipulate the application's behavior to gain unauthorized access to sensitive data. The stored nature of the vulnerability means that any user who views affected content becomes a potential victim, creating a widespread impact across all users of the application. This vulnerability particularly affects web applications that rely on user-generated content, as it allows attackers to compromise the entire user base through a single injection point. The attack surface is amplified when considering that the vulnerability exists across multiple versions, suggesting that the security flaws were not properly addressed during application development or maintenance cycles.
Mitigation strategies for this vulnerability should focus on implementing comprehensive input sanitization and output encoding mechanisms throughout the application's data processing pipeline. The most effective immediate solution involves implementing strict input validation that filters out or escapes potentially malicious content before storage, combined with proper output encoding when rendering user-supplied data in web contexts. Organizations should implement Content Security Policy headers to limit script execution and prevent unauthorized code injection. Additionally, regular security audits and code reviews should be conducted to identify similar vulnerabilities in other application components. This remediation approach aligns with ATT&CK technique T1566, which addresses social engineering through malicious content injection, and supports the broader security principle of defense in depth. The vulnerability also highlights the importance of maintaining up-to-date security practices and implementing automated security testing as part of the software development lifecycle to prevent similar issues from emerging in future versions of the application.