CVE-2020-14973 in webTareas
Summary
by MITRE
The loginForm within the general/login.php webpage in webTareas 2.0p8 suffers from a Reflected Cross Site Scripting (XSS) vulnerability via the query string.
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Analysis
by VulDB Data Team • 06/23/2020
The vulnerability identified as CVE-2020-14973 represents a critical reflected cross site scripting flaw within the webTareas 2.0p8 web application. This vulnerability exists in the general/login.php page where the loginForm component fails to properly sanitize user input from the query string parameters. The flaw allows an attacker to inject malicious script code that gets executed in the victim's browser when the page is rendered, creating a persistent security risk for all users interacting with the login interface. The reflected nature of this vulnerability means that the malicious payload is reflected back to the user through the web application's response without being stored, making it particularly dangerous for targeted attacks.
The technical implementation of this vulnerability stems from inadequate input validation and output encoding practices within the webTareas application. When users navigate to the login page with malicious query parameters, the application fails to properly escape or filter the input data before incorporating it into the HTML response. This creates an environment where attacker-controlled data can be interpreted as executable JavaScript code rather than plain text. The vulnerability specifically affects the query string handling within the general/login.php endpoint, making it accessible through URL manipulation. According to CWE standards, this maps directly to CWE-79 which defines the weakness of cross site scripting due to improper neutralization of input during web page generation.
The operational impact of this vulnerability extends beyond simple data theft or session hijacking. Attackers can exploit this flaw to perform various malicious activities including but not limited to credential theft, session manipulation, and redirection to malicious websites. The reflected nature of the XSS means that attackers can craft specific URLs that, when clicked by victims, will execute their malicious scripts in the victim's browser context. This makes the vulnerability particularly effective for phishing attacks or social engineering campaigns where users are tricked into clicking malicious links. The attack surface is significant since the login page is a frequently accessed component, increasing the potential exposure window for exploitation.
Security professionals should prioritize immediate remediation of this vulnerability through proper input sanitization and output encoding mechanisms. The recommended mitigation involves implementing strict input validation on all query string parameters before they are processed or displayed in the web interface. This includes using appropriate HTML escaping functions and context-specific encoding techniques to prevent script execution. Additionally, implementing a Content Security Policy (CSP) header can provide an additional layer of protection against XSS attacks by restricting the sources from which scripts can be loaded. Organizations should also consider implementing web application firewalls and regular security scanning to detect similar vulnerabilities in other components of their web infrastructure. This vulnerability aligns with ATT&CK technique T1566 which describes social engineering tactics involving the use of malicious links to compromise systems. The remediation approach should follow established security frameworks such as OWASP Top Ten recommendations for preventing XSS vulnerabilities through proper input validation and output encoding practices.