CVE-2025-67651 in Appointment Scheduler
Summary
by MITRE • 07/31/2026
A Cross-Site Request Forgery (CSRF) vulnerability has been identified in multiple PHP Jabbers scripts. The lack of CSRF tokens or appropriate SameSite attributes allows an attacker to send unauthorized requests in the context of an authenticated user, leading to unauthorized administrative actions, such as creating new admin accounts.
This issue was fixed in the versions specified in the affected products list.
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Analysis
by VulDB Data Team • 07/31/2026
Cross-site request forgery vulnerabilities represent a critical class of web application security flaws that exploit the trust relationship between web applications and their users. In this particular case involving PHP Jabbers scripts, the vulnerability stems from insufficient protection mechanisms against unauthorized requests initiated by attackers on behalf of authenticated users. The absence of proper CSRF tokens or appropriate SameSite attributes creates an exploitable condition where malicious actors can craft requests that appear legitimate to the target application, effectively bypassing authentication controls.
The technical flaw manifests when web applications fail to implement adequate request validation mechanisms. Without CSRF tokens embedded in forms or API endpoints, the application cannot distinguish between genuine user-initiated requests and those crafted by attackers. The SameSite cookie attribute serves as a crucial defense mechanism that prevents browsers from sending cookies along with cross-site requests, but its absence leaves applications vulnerable to exploitation. This particular vulnerability enables attackers to perform administrative actions without proper authorization, including creating new administrator accounts, which fundamentally compromises the application's security model and access controls.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it allows for complete compromise of administrative functions within the affected PHP Jabbers scripts. An attacker who successfully exploits this CSRF vulnerability can establish persistent access to the system through newly created administrative accounts, potentially leading to data exfiltration, system modification, or complete system takeover. The implications are particularly severe given that the vulnerability enables unauthorized users to assume administrative privileges without requiring knowledge of existing credentials, making detection and prevention significantly more challenging.
Security best practices dictate implementing robust CSRF protection measures including the use of anti-CSRF tokens that are unique per user session and validated on each request. The implementation should follow established standards such as those recommended by the Open Web Application Security Project and align with CWE-352 which specifically addresses cross-site request forgery vulnerabilities. Organizations should also consider implementing the SameSite cookie attributes as part of their defense-in-depth strategy, following guidelines from the IETF RFC 6749 and related security frameworks. Additionally, the ATT&CK framework categorizes this vulnerability under privilege escalation techniques where adversaries leverage weak session controls to gain elevated access rights.
Mitigation strategies should include immediate deployment of patches released by the software vendor, which address the specific CSRF implementation gaps in affected PHP Jabbers versions. Organizations must also conduct comprehensive security assessments of all web applications to identify similar vulnerabilities, particularly those involving authentication and authorization mechanisms. Regular security testing including automated scanning and manual penetration testing should be implemented to detect potential CSRF flaws before they can be exploited. The remediation process requires not only patching the identified vulnerability but also implementing proper session management controls, ensuring consistent application of CSRF protection across all user-facing interfaces, and maintaining up-to-date security configurations that align with current industry standards for web application security.