CVE-2025-8814 in pybbs
Summary
by MITRE • 08/10/2025
A vulnerability was found in atjiu pybbs up to 6.0.0 and classified as problematic. This issue affects the function setCookie of the file src/main/java/co/yiiu/pybbs/util/CookieUtil.java. The manipulation leads to cross-site request forgery. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The patch is named 8aa2bb1aef3346e49aec6358edf5e47ce905ae7b. It is recommended to apply a patch to fix this issue.
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Analysis
by VulDB Data Team • 08/13/2025
CVE-2025-8814 represents a cross-site request forgery vulnerability within the atjiu pybbs application version 6.0.0 and earlier, classified under CWE-352 which specifically addresses Cross-Site Request Forgery attacks. This vulnerability exists within the CookieUtil.java file at the setCookie function, where improper handling of cookie management creates an exploitable condition that allows attackers to manipulate user sessions and execute unauthorized actions. The flaw enables remote exploitation, meaning attackers can leverage this vulnerability without requiring physical access to the target system, making it particularly dangerous in web applications where user interaction is essential for normal operation. The vulnerability's classification as problematic indicates that it presents significant security risks that could compromise user authentication and session management within the application.
The technical implementation of this vulnerability stems from inadequate validation and sanitization of cookie data within the setCookie method, which fails to properly establish security boundaries for session tokens. This weakness allows malicious actors to craft crafted requests that can manipulate cookie values, potentially leading to session hijacking, privilege escalation, or unauthorized administrative actions. The public disclosure of the exploit means that threat actors have already developed working methods to leverage this flaw, increasing the urgency for remediation. The vulnerability's impact extends beyond simple data theft, as it can enable attackers to perform actions on behalf of authenticated users, potentially compromising entire user accounts and system integrity.
From an operational standpoint, this vulnerability poses significant risks to the application's security posture and user trust. The remote exploit capability means that attackers can target users from any location, making the attack surface extremely broad. The patch referenced as 8aa2bb1aef3346e49aec6358edf5e47ce905ae7b addresses the core issue by implementing proper cookie validation mechanisms and ensuring that session tokens are properly secured against manipulation. Organizations using this application must urgently apply the patch to prevent potential exploitation, as the public availability of the exploit increases the likelihood of successful attacks. The vulnerability also highlights the importance of proper input validation and security controls in session management components.
Mitigation strategies should include immediate patch application as recommended, along with implementing additional security controls such as implementing anti-CSRF tokens in forms, utilizing secure cookie attributes like HttpOnly and Secure flags, and establishing proper session management protocols. Organizations should also consider implementing web application firewalls to detect and block suspicious requests that attempt to manipulate cookie values. The vulnerability demonstrates the critical importance of adhering to security best practices in session management, as outlined in the OWASP Top Ten and NIST cybersecurity guidelines, where proper session handling is fundamental to protecting web applications from session-based attacks. Regular security assessments and penetration testing should be conducted to identify similar vulnerabilities in other application components and ensure comprehensive protection against evolving threats.