CVE-2024-29930 in Crypto Converter Widget Plugin
Summary
by MITRE • 03/27/2024
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in CurrencyRate.Today Crypto Converter Widget allows Stored XSS.This issue affects Crypto Converter Widget: from n/a through 1.8.4.
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Analysis
by VulDB Data Team • 04/12/2025
The vulnerability identified as CVE-2024-29930 represents a critical cross-site scripting flaw within the CurrencyRate.Today Crypto Converter Widget application. This weakness manifests as an improper neutralization of input during web page generation, creating a persistent stored XSS attack vector that can compromise user sessions and execute malicious code within the victim's browser context. The vulnerability specifically impacts versions of the Crypto Converter Widget ranging from the initial release through version 1.8.4, indicating a prolonged exposure window where users have been susceptible to this security weakness.
The technical implementation of this vulnerability stems from inadequate input validation and sanitization mechanisms within the widget's web page generation process. When users interact with the crypto converter widget and provide input data, the application fails to properly sanitize or escape user-supplied content before incorporating it into dynamically generated web pages. This allows attackers to inject malicious script code that persists in the application's database or storage mechanisms, making the payload execute whenever other users view the affected pages. The stored nature of this XSS vulnerability means that the malicious code is not limited to a single request but remains embedded within the application's data store, executing against any user who accesses the compromised content.
The operational impact of this vulnerability extends beyond simple data theft or session hijacking, as it provides attackers with the capability to perform a wide range of malicious activities within the context of authenticated users. Attackers can leverage this vulnerability to steal sensitive information, modify user preferences, redirect users to malicious websites, or even execute arbitrary commands on behalf of the victim. The persistent nature of stored XSS makes this vulnerability particularly dangerous as it can affect multiple users over an extended period without requiring repeated exploitation attempts. Additionally, the vulnerability affects a widely used crypto converter widget, potentially exposing thousands or millions of users to this security risk depending on the application's user base and deployment scope.
Security professionals should consider this vulnerability in the context of CWE-79 which specifically addresses cross-site scripting flaws, and its relationship to the ATT&CK framework's T1566.001 technique for initial access through spearphishing attachments, as attackers may leverage this vulnerability to deliver malicious payloads to unsuspecting users. The mitigation strategy should focus on implementing comprehensive input validation and output encoding mechanisms, ensuring that all user-supplied data is properly sanitized before being processed or stored. Organizations should also consider implementing Content Security Policy headers, employing proper escaping techniques for dynamic content generation, and conducting regular security audits of web applications to identify and remediate similar vulnerabilities. The affected version range indicates that this vulnerability has existed for an extended period, emphasizing the critical importance of timely patch management and regular security assessments to prevent long-term exposure to such threats.