CVE-2026-39748 in EduMall Plugin
Summary
by MITRE • 10/06/2026
Unauthenticated Cross Site Scripting (XSS) in EduMall <= 4.5.3 versions.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 10/06/2026
The vulnerability identified as an unauthenticated cross-site scripting flaw within EduMall versions up to and including 4.5.3 represents a critical security deficiency that allows attackers to inject malicious client-side scripts into web pages viewed by other users without requiring any form of authentication or prior login credentials. This specific type of persistent or reflected XSS attack vector exploits the application's failure to properly sanitize user-supplied input before rendering it in the browser environment, thereby bypassing standard access controls and enabling immediate exploitation against any visitor to the affected platform. The absence of an authentication requirement significantly lowers the barrier for entry, allowing threat actors with minimal technical expertise to execute attacks simply by crafting a malicious URL or submitting specific data fields that are processed directly into the HTML output without adequate validation mechanisms in place.
From a technical perspective, this vulnerability stems from improper neutralization of special elements used in script tags within the application's input handling routines. When user inputs such as search queries, profile descriptions, or comment sections are transmitted to the server and subsequently reflected back or stored for later retrieval, the system fails to encode characters that have special meaning in JavaScript contexts, including angle brackets, quotes, and ampersands. This oversight permits an attacker to embed executable code fragments directly into the page structure. The browser interprets these injected scripts as legitimate content belonging to the application's domain due to same-origin policy constraints, granting the malicious script full access to cookies, session tokens, local storage data, and other sensitive information associated with that domain.
The operational impact of this vulnerability is severe, particularly in an educational marketplace context where user trust and data privacy are paramount. Successful exploitation can lead to account takeover attacks if attackers harvest session identifiers or authentication cookies from victims who are logged into their accounts while browsing the compromised page. Furthermore, it enables phishing campaigns where the attacker can dynamically alter the appearance of legitimate login forms to steal credentials, or redirect users to malicious external sites designed to distribute malware. In more advanced scenarios, the vulnerability allows for keylogging capabilities within the session context, potentially exposing sensitive personal information such as names, addresses, and payment details stored by educational institutions or students using the platform. This compromises not only individual user privacy but also the integrity of the entire marketplace ecosystem, eroding confidence in the service provider's ability to secure digital transactions and communications.
This flaw aligns with Common Weakness Enumeration identifier CWE-79, which classifies improper neutralization of input during web page generation as a primary cause for cross-site scripting vulnerabilities. The attack methodology corresponds closely to MITRE ATT&CK technique T1059, specifically the execution of JavaScript within browser contexts, and often facilitates subsequent data exfiltration techniques categorized under T1005 or credential theft via T1539 if session cookies are targeted. To mitigate this risk effectively, developers must implement strict output encoding for all dynamic content rendered in HTML contexts, ensuring that special characters are converted to their corresponding HTML entities before display. Additionally, adopting Content Security Policy headers can provide a robust defense-in-depth strategy by restricting the sources from which scripts can be loaded and executed, thereby neutralizing many XSS payloads even if input sanitization fails. Regular security audits focusing on input validation logic and automated static analysis tools configured to detect unsanitized output patterns are essential for maintaining long-term resilience against such injection-based attacks in web applications.