CVE-2015-4677 in FiverrScript
Summary
by MITRE
Cross-site request forgery (CSRF) vulnerability in FiverrScript (aka Fiverr Script) 7.2 allows remote attackers to hijack the authentication of administrators for requests that create a new admin via a request to administrator/admins_create.php.
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Analysis
by VulDB Data Team • 01/19/2025
The CVE-2015-4677 vulnerability represents a critical cross-site request forgery flaw in FiverrScript version 7.2, a popular marketplace platform solution. This vulnerability exists within the administrative interface of the application and specifically targets the administrator account creation functionality. The flaw allows remote attackers to manipulate the authentication state of administrators by crafting malicious requests that leverage the existing session to create new administrative accounts without proper authorization.
This CSRF vulnerability stems from the absence of proper anti-CSRF token validation mechanisms within the administrator/admins_create.php endpoint. When an authenticated administrator visits a malicious website or clicks on a crafted link, the attacker can trigger an automatic request to the vulnerable endpoint. The application fails to verify that the request originated from a legitimate administrative interface rather than a malicious third-party site, effectively allowing unauthorized account creation. The vulnerability operates at the application layer and requires no prior authentication to exploit, making it particularly dangerous as it can be triggered through social engineering or by simply having an administrator browse to a compromised page.
The operational impact of this vulnerability is severe and multifaceted. An attacker who successfully exploits this CSRF flaw can establish persistence within the target system by creating new administrative accounts with full privileges. This compromise enables the attacker to perform actions such as modifying or deleting content, accessing sensitive user data, changing system configurations, and potentially escalating privileges further within the application. The vulnerability affects the integrity and confidentiality of the entire platform, as the newly created administrator accounts can be used to maintain long-term access to the system. Additionally, the compromised platform may become a vector for further attacks against users or other systems within the network infrastructure.
Mitigation strategies for CVE-2015-4677 should focus on implementing robust anti-CSRF protection mechanisms within the FiverrScript application. The most effective approach involves implementing unique, unpredictable tokens for each administrative request that are validated server-side before processing. This aligns with CWE-352, which specifically addresses cross-site request forgery vulnerabilities, and follows the principles outlined in the OWASP CSRF Prevention Cheat Sheet. Organizations should also implement proper input validation and output encoding, establish secure session management practices, and deploy web application firewalls to monitor for suspicious activity. Regular security assessments and code reviews should be conducted to identify similar vulnerabilities in other endpoints, as this type of flaw often indicates broader security gaps in the application architecture. The vulnerability also maps to ATT&CK technique T1078 which covers valid accounts, as compromised administrative credentials can be used to maintain persistent access to the system.