CVE-2025-58115 in ChatLuck
Summary
by MITRE • 10/16/2025
ChatLuck contains a cross-site scripting vulnerability in Guest User Sign-up. If exploited, an arbitrary script may be executed on the web browser of the user who is accessing the product.
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Analysis
by VulDB Data Team • 10/16/2025
The vulnerability identified as CVE-2025-58115 represents a critical cross-site scripting flaw within the ChatLuck application's guest user sign-up functionality. This security weakness allows attackers to inject malicious scripts into the web application's user registration process, potentially compromising the confidentiality and integrity of user data. The vulnerability specifically affects the guest user sign-up mechanism, which serves as an entry point for unauthenticated users to access the platform's services. When exploited, this flaw enables adversaries to execute arbitrary code within the victim's browser context, potentially leading to session hijacking, data theft, or further exploitation of the compromised system.
The technical nature of this vulnerability aligns with CWE-79, which categorizes cross-site scripting as a code injection flaw that occurs when untrusted data is improperly handled within web applications. The flaw manifests when the application fails to properly sanitize or escape user input during the guest sign-up process, allowing malicious payloads to be stored and subsequently executed when other users interact with the affected functionality. This type of vulnerability typically arises from insufficient input validation and output encoding mechanisms within the web application's codebase. Attackers can craft malicious input containing script tags or other executable code that gets processed and rendered without proper security controls, creating a persistent threat vector for all users who encounter the compromised content.
The operational impact of this vulnerability extends beyond simple script execution, potentially enabling sophisticated attack chains that could compromise entire user sessions and sensitive data. An attacker who successfully exploits this vulnerability could gain access to guest user accounts, extract session tokens, or redirect users to malicious websites. The implications are particularly severe given that guest users may not have the same security awareness or protection mechanisms as authenticated users, making them more susceptible to exploitation. This vulnerability could also serve as a stepping stone for more extensive attacks, allowing threat actors to establish persistent access or escalate privileges within the application environment. The attack surface is further expanded as the vulnerability affects the sign-up process, which is typically one of the most accessed features of any web application.
Mitigation strategies for CVE-2025-58115 should focus on implementing robust input validation and output encoding mechanisms throughout the guest user sign-up process. Organizations should apply proper sanitization techniques to all user inputs, ensuring that potentially dangerous characters and script tags are either escaped or removed before processing. The implementation of Content Security Policy headers can provide additional protection against script execution, while regular security testing including automated vulnerability scanning and manual penetration testing should be conducted to identify similar weaknesses. According to ATT&CK framework category TA0001, this vulnerability could be leveraged for initial access and privilege escalation, making it essential to implement defense-in-depth measures including web application firewalls, input validation controls, and comprehensive monitoring of user registration activities. Regular security updates and code reviews should be enforced to prevent similar vulnerabilities from emerging in future releases, while user education about recognizing and reporting suspicious website behavior can provide additional layers of protection against exploitation attempts.