CVE-2025-63883: Electic-Shop v1.0 Exposed to DOM-Based XSS – Secure Your E-Commerce Site!

Overview

This article details CVE-2025-63883, a DOM-based Cross-Site Scripting (XSS) vulnerability discovered in electic-shop v1.0 (Bhabishya-123/E-commerce). This vulnerability allows attackers to inject malicious JavaScript code into a victim’s browser through a crafted URL, potentially leading to data theft, session hijacking, or other malicious activities.

Technical Details

The vulnerability stems from the application’s failure to properly sanitize or encode user-controlled input before inserting it into the Document Object Model (DOM). Specifically, the client-side JavaScript code within electic-shop v1.0 reads attacker-controlled input – often from the URL or page fragment (the part after the #) – and uses this input directly in unsafe DOM manipulation functions such as innerHTML, insertAdjacentHTML, or document.write. Because the input is not properly escaped or validated, a malicious actor can inject arbitrary HTML and JavaScript code.

Example Scenario: An attacker crafts a URL containing malicious JavaScript in the URL fragment (e.g., https://electic-shop.example.com/#<script>alert('XSS!')</script>). When a victim clicks this link, the JavaScript code is executed in the victim’s browser within the context of the electic-shop domain.

CVSS Analysis

• CVE ID: CVE-2025-63883
• Severity: MEDIUM
• CVSS Score: 5.4
• Vector String (Example): CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N (This is just an example; the actual vector may vary.)

A CVSS score of 5.4 indicates a medium severity vulnerability. The attack requires user interaction (UI:R), meaning the victim needs to click a malicious link. The attacker does not need any privileges (PR:N). The impact on confidentiality (C:L) and integrity (I:L) is limited, while availability (A:N) is not affected.

Possible Impact

Successful exploitation of this DOM-based XSS vulnerability can lead to several negative consequences, including:

• Account Hijacking: An attacker can steal a victim’s session cookies and hijack their account.
• Data Theft: Sensitive information, such as personal details or payment information, can be stolen.
• Website Defacement: The attacker can modify the content of the website displayed to the victim.
• Malware Distribution: The attacker can redirect the victim to a malicious website or download malware onto their device.

Mitigation and Patch Steps

To mitigate this vulnerability, the following steps should be taken:

1. Input Sanitization: Implement rigorous input sanitization to remove or escape any potentially malicious characters before inserting data into the DOM. Use context-aware escaping functions appropriate for the target DOM API (e.g., textContent instead of innerHTML where possible).
2. Content Security Policy (CSP): Implement a strong Content Security Policy (CSP) to restrict the sources from which the browser can load resources. This can help to prevent the execution of malicious JavaScript code injected by an attacker.
3. Regular Security Audits: Conduct regular security audits and penetration testing to identify and address vulnerabilities in the application.
4. Update Frameworks and Libraries: Ensure all frameworks and libraries used in the application are up-to-date with the latest security patches.
5. Encode output: HTML encode any data to be displayed in the browser.

References

CVE-2025-63883 Security Advisory on GitHub
OWASP: DOM Based XSS
Mozilla Developer Network: Content Security Policy (CSP)