CVE-2024-33101 in ThinkSAAS
Summary
by MITRE • 04/30/2024
A stored cross-site scripting (XSS) vulnerability in the component /action/anti.php of ThinkSAAS v3.7.0 allows attackers to execute arbitrary web scripts or HTML via a crafted payload injected into the word parameter.
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Analysis
by VulDB Data Team • 04/23/2025
The vulnerability identified as CVE-2024-33101 represents a critical stored cross-site scripting flaw within the ThinkSAAS v3.7.0 content management system. This vulnerability exists in the /action/anti.php component where user input is not properly sanitized or validated before being processed and stored within the application's database. The specific weakness lies in the handling of the word parameter which serves as an entry point for malicious payload injection. When an attacker crafts a malicious script and submits it through this parameter, the application fails to adequately filter or escape the input, allowing the malicious code to be permanently stored in the system's database. This stored nature of the vulnerability means that the malicious script becomes persistent and will execute every time the affected page is loaded or accessed by any user, including administrators. The flaw directly aligns with CWE-79 which defines cross-site scripting as the improper handling of untrusted data within a web application, creating opportunities for attackers to inject client-side scripts. The vulnerability exposes the application to a range of potential attacks including session hijacking, credential theft, and unauthorized access to sensitive data.
The operational impact of this stored XSS vulnerability extends beyond simple script execution as it creates a persistent threat vector that can be exploited by attackers to compromise user sessions and gain unauthorized access to the application. When users navigate to pages that display the malicious content, their browsers will execute the injected scripts in the context of the vulnerable application, potentially allowing attackers to steal cookies, modify page content, redirect users to malicious sites, or perform actions on behalf of authenticated users. The attack surface is particularly concerning because the vulnerability affects the anti.php component, which suggests this is a security-related function that should be protecting against malicious activity rather than being susceptible to it. This creates a dangerous scenario where an attacker can exploit a security mechanism to undermine the application's own protective measures. The vulnerability's persistence means that even after the initial injection, the malicious code continues to execute without requiring repeated exploitation attempts, making it particularly dangerous for long-term compromise. From an attack chain perspective, this vulnerability maps to several ATT&CK techniques including T1566 for initial access through malicious payloads and T1059 for command and control through script execution. The fact that this affects a core security component like anti.php also raises concerns about the application's overall security posture and input validation practices.
Mitigation strategies for CVE-2024-33101 must address both immediate remediation and long-term security improvements within the ThinkSAAS framework. The most direct solution involves implementing proper input sanitization and output encoding for all user-supplied data, particularly in the word parameter handling within the anti.php component. This includes applying strict validation rules, escaping special characters, and implementing Content Security Policy headers to prevent unauthorized script execution. Organizations should also consider implementing web application firewalls that can detect and block malicious payloads attempting to exploit this vulnerability. The application should be updated to a patched version that addresses the input validation flaws in the anti.php component, with immediate patching being essential given the stored nature of the vulnerability. Additionally, comprehensive security testing including dynamic application security testing and manual penetration testing should be conducted to identify any additional vulnerabilities in the application's input handling mechanisms. Regular security audits should be implemented to ensure that similar issues do not arise in other components of the application. Organizations should also establish proper security monitoring procedures to detect any unauthorized access attempts or malicious activities that may indicate exploitation of this vulnerability. The remediation process should include thorough testing to ensure that the patch does not introduce regressions in application functionality while effectively addressing the XSS vulnerability. Given the potential for privilege escalation through session hijacking and credential theft, organizations should also review and reset user sessions, change administrative credentials, and implement additional authentication security measures to protect against potential compromise of the application's security infrastructure.