CVE-2022-28545 in FUDforum
Summary
by MITRE • 05/06/2022
FUDforum 3.1.1 is vulnerable to Stored XSS.
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Analysis
by VulDB Data Team • 05/11/2022
FUDforum version 3.1.1 contains a critical stored cross-site scripting vulnerability that allows attackers to inject malicious scripts into the application's database through user input fields. This vulnerability stems from inadequate input validation and output sanitization mechanisms within the forum's message posting and user profile handling components. The flaw enables an attacker to craft malicious payloads that persist in the database and execute whenever other users view the affected content, making it particularly dangerous for community-driven platforms where user-generated content is prevalent. The vulnerability exists in the application's handling of HTML content and user-submitted data, where proper encoding and validation checks are either missing or insufficiently implemented.
The technical exploitation of CVE-2022-28545 occurs when an attacker submits malicious script code through forum posts, user profiles, or other input fields that are not properly sanitized before being stored in the database. When other users browse the affected content, their browsers execute the injected scripts in the context of the vulnerable application, potentially allowing attackers to steal session cookies, perform unauthorized actions on behalf of users, or redirect them to malicious sites. This stored nature of the vulnerability means that the malicious code remains persistent even after the initial injection, affecting all users who encounter the compromised content without proper mitigation measures. The vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws in web applications.
The operational impact of this vulnerability extends beyond simple script execution as it can enable sophisticated attack chains targeting user accounts and session management. Attackers can leverage the stored XSS to harvest authentication tokens, perform account takeovers, or create backdoor access points within the forum environment. The vulnerability affects the integrity and confidentiality of user data, potentially exposing private communications and user credentials. Organizations running FUDforum 3.1.1 are at risk of reputational damage, regulatory compliance violations, and potential legal consequences due to inadequate security controls. The attack surface is particularly broad since forum platforms typically contain sensitive user information, private messages, and administrative functions that could be compromised through this vulnerability.
Mitigation strategies for CVE-2022-28545 require immediate implementation of comprehensive input validation and output encoding mechanisms throughout the application. Organizations should implement strict sanitization of all user-submitted content using established libraries and frameworks that properly encode HTML entities and remove potentially dangerous script tags. The application should employ Content Security Policy headers to limit script execution and prevent unauthorized code injection. Regular security audits and penetration testing should be conducted to identify similar vulnerabilities in other input handling components. System administrators should also consider implementing web application firewalls and monitoring solutions to detect and block suspicious script injection attempts. Patch management procedures must be established to ensure timely updates to the FUDforum software and all related components to prevent exploitation of known vulnerabilities. This remediation approach aligns with ATT&CK technique T1566 which covers social engineering and malicious code delivery through web applications, emphasizing the need for robust input validation and output encoding controls.