CVE-2021-41318 in WhatsUp Gold
Summary
by MITRE • 09/29/2021
In Progress WhatsUp Gold prior to version 21.1.0, an application endpoint failed to adequately sanitize malicious input. which could allow an unauthenticated attacker to execute arbitrary code in a victim's browser.
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Analysis
by VulDB Data Team • 05/03/2025
The vulnerability identified as CVE-2021-41318 affects Progress WhatsUp Gold software versions prior to 21.1.0, representing a critical security flaw that stems from insufficient input validation within the application's web interface. This weakness exists in the software's handling of user-supplied data through web endpoints, creating a pathway for malicious actors to exploit the system through cross-site scripting attacks. The vulnerability specifically manifests when the application fails to properly sanitize data received from external sources, allowing attackers to inject malicious payloads that execute within the victim's browser context without requiring authentication or prior access to the system.
The technical implementation of this vulnerability aligns with common web application security flaws classified under CWE-79, which describes Cross-Site Scripting (XSS) conditions where applications fail to properly validate or escape user input before rendering it in web pages. The flaw operates by accepting unfiltered input through web endpoints and subsequently processing this data without adequate sanitization measures, enabling attackers to inject malicious scripts that execute in the context of other users' browsers. This type of vulnerability is particularly dangerous because it can be exploited remotely without requiring any authentication credentials, making it accessible to anyone who can interact with the vulnerable application's web interface.
The operational impact of CVE-2021-41318 extends beyond simple data theft or session hijacking, as it allows attackers to execute arbitrary code within victim browsers, potentially enabling full compromise of user sessions and access to sensitive network resources. Attackers can leverage this vulnerability to perform actions such as stealing user credentials, accessing confidential data, modifying system configurations, or even establishing persistent backdoors within the network environment. The attack surface is particularly concerning given that the vulnerability affects a network monitoring and management tool, which typically has elevated privileges and access to critical network infrastructure, making successful exploitation potentially devastating to organizational security posture.
Mitigation strategies for this vulnerability should prioritize immediate software updates to Progress WhatsUp Gold version 21.1.0 or later, which includes proper input sanitization and validation measures. Organizations should also implement additional security controls such as web application firewalls to detect and block malicious input patterns, regular security assessments of web applications, and comprehensive network monitoring to identify potential exploitation attempts. The remediation process should include thorough testing of the updated software to ensure that the fix does not introduce compatibility issues with existing network management workflows, while also implementing proper input validation practices across all web applications within the organization to prevent similar vulnerabilities from emerging in other systems. This vulnerability demonstrates the critical importance of maintaining up-to-date security patches and proper input validation in network management tools that serve as attack vectors for broader network compromise operations.