CVE-2020-28092 in PESCMS Team
Summary
by MITRE • 11/18/2020
PESCMS Team 2.3.2 has multiple reflected XSS via the id parameter:?g=Team&m=Task&a=my&status=3&id=,?g=Team&m=Task&a=my&status=0&id=,?g=Team&m=Task&a=my&status=1&id=,?g=Team&m=Task&a=my&status=10&id=
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Analysis
by VulDB Data Team • 05/04/2025
The vulnerability identified as CVE-2020-28092 affects PESCMS Team version 2.3.2 and represents a critical reflected cross-site scripting flaw that enables remote attackers to inject malicious scripts into web applications. This vulnerability manifests through multiple URL parameters within the application's task management functionality where the id parameter is directly reflected in the HTTP response without proper input validation or output encoding. The affected endpoints include various task status views such as my task list with different status filters, making the attack surface particularly broad and accessible to threat actors.
The technical implementation of this vulnerability stems from the application's failure to sanitize user-supplied input before incorporating it into dynamically generated HTML responses. When a user navigates to any of the specified URLs with a malicious id parameter value, the application directly echoes the parameter content back to the browser without appropriate HTML escaping or encoding mechanisms. This creates an ideal environment for reflected XSS attacks where attackers can craft malicious URLs that, when clicked by victims, execute arbitrary JavaScript code within the victim's browser context. The vulnerability is particularly concerning because it affects multiple status parameters, suggesting a systemic lack of input validation throughout the application's task management module.
The operational impact of this vulnerability extends beyond simple data theft or session hijacking. Attackers can leverage this reflected XSS to perform a wide range of malicious activities including but not limited to credential theft, session manipulation, redirection to malicious sites, and data exfiltration from authenticated users. The vulnerability's accessibility through multiple status filters increases the likelihood of successful exploitation as attackers can craft payloads that work across different task states. This makes it particularly dangerous in environments where users may be browsing different task statuses or where automated scanning tools could discover the vulnerability more easily.
From a cybersecurity framework perspective, this vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws in web applications. The issue also maps to several ATT&CK techniques including T1566.001 for initial access through malicious links and T1071.001 for application layer protocol usage. Organizations utilizing PESCMS Team 2.3.2 should immediately implement input validation measures including parameter sanitization and output encoding to prevent malicious content from being reflected back to users. The recommended mitigation strategies include implementing strict input validation for all user-supplied parameters, deploying Content Security Policy headers to limit script execution, and conducting comprehensive security testing to identify similar vulnerabilities throughout the application's codebase. Additionally, the application should be updated to a patched version that properly handles user input and implements proper HTML escaping mechanisms to prevent reflected XSS attacks from occurring.