CVE-2026-94179 in Payment Button Plugin
Summary
by MITRE • 09/23/2026
Unauthenticated Cross Site Scripting (XSS) in Razorpay Payment Button <= 2.4.9 versions.
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Analysis
by VulDB Data Team • 09/24/2026
The vulnerability identified as an unauthenticated Cross-Site Scripting flaw within the Razorpay Payment Button plugin, specifically affecting versions up to and including 2.4.9, represents a significant security risk for websites relying on this integration for e-commerce transactions. This type of attack vector allows malicious actors to inject client-side scripts into web pages viewed by other users without requiring any form of authentication or prior login credentials. The core issue stems from insufficient input validation and sanitization mechanisms within the plugin's codebase, which fails to properly neutralize special characters that could be interpreted as executable commands when rendered in a user's browser environment.
From a technical perspective, this flaw typically manifests through parameters such as product names, customer notes, or transaction descriptions passed via HTTP requests like GET or POST methods. When these inputs are reflected directly into the HTML output without adequate encoding, an attacker can craft a malicious payload containing JavaScript code. This payload is then executed in the context of the victim's session whenever they load the compromised page. The lack of authentication means that any internet user with access to the website can trigger this vulnerability, making it particularly dangerous as it does not require privilege escalation or social engineering beyond luring users to a specific URL containing the exploit code.
The operational impact of such an unauthenticated XSS vulnerability is severe and multifaceted. Attackers can steal sensitive session cookies, effectively hijacking user sessions to impersonate legitimate customers or administrators. This can lead to unauthorized access to account information, financial data theft, or manipulation of transaction details. Furthermore, the attacker may redirect users to phishing sites designed to capture login credentials for banking services or other critical accounts associated with the victim. In more advanced scenarios, the vulnerability could be leveraged to deface the website by altering its visual presentation or to distribute malware through drive-by download techniques if combined with browser-specific exploits.
This vulnerability aligns closely with Common Weakness Enumeration (CWE) ID 79, which categorizes Improper Neutralization of Input During Web Page Generation commonly known as Cross-site Scripting. It also maps directly to the MITRE ATT&CK framework under technique T1059, specifically sub-technique T1059.007 for JavaScript execution. The unauthenticated nature of the attack places it within the initial access or persistence phases depending on how the payload is utilized, often falling under the broader category of client-side code injection attacks that exploit trust relationships between users and web applications.
Mitigation strategies must focus primarily on immediate patching to version 2.5.0 or later where these input validation issues have been addressed by the developers. In addition to updating the software, administrators should implement Content Security Policy headers to restrict the sources from which scripts can be loaded, thereby mitigating the impact of any successfully injected script even if a vulnerability exists. Input sanitization libraries and output encoding practices should be rigorously applied across all user-facing inputs within the application stack. Regular security audits and penetration testing are recommended to identify similar flaws in other plugins or custom code that may share these architectural weaknesses.