CVE-2025-31601 in Appointment Scheduler Plugin
Summary
by MITRE • 03/31/2025
Cross-Site Request Forgery (CSRF) vulnerability in appointy Appointy Appointment Scheduler allows Cross Site Request Forgery. This issue affects Appointy Appointment Scheduler: from n/a through 4.2.1.
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Analysis
by VulDB Data Team • 03/31/2025
The CVE-2025-31601 vulnerability represents a critical cross-site request forgery flaw within the appointy Appointy Appointment Scheduler application. This vulnerability allows attackers to execute unauthorized actions on behalf of authenticated users by exploiting the application's failure to properly validate request origins and implement adequate anti-CSRF protection mechanisms. The affected version range spans from the initial release through version 4.2.1, indicating a persistent security weakness that has remained unaddressed for an extended period. This vulnerability falls under the CWE-352 category, which specifically addresses Cross-Site Request Forgery vulnerabilities, and aligns with the ATT&CK technique T1566.002 for Phishing with Social Engineering. The flaw represents a fundamental breakdown in the application's security architecture where user sessions can be manipulated without proper validation.
The technical implementation of this CSRF vulnerability stems from the application's insufficient protection against malicious requests that originate from external domains or contexts. When users are authenticated within the appointy scheduler system, their browser sessions contain valid credentials that can be leveraged by attackers to perform actions such as creating, modifying, or deleting appointment bookings without the user's explicit consent or knowledge. The vulnerability typically manifests when the application processes requests that lack proper anti-CSRF tokens, referer headers, or origin validation checks that would normally prevent unauthorized requests from being processed. Attackers can craft malicious web pages or exploit existing vulnerabilities in other applications to trigger these unauthorized actions, effectively bypassing the application's authentication and authorization mechanisms.
The operational impact of this vulnerability extends beyond simple data manipulation to encompass potential financial loss, service disruption, and reputational damage for organizations using the appointy scheduler. An attacker could exploit this weakness to cancel appointments, book services for themselves or others, modify existing bookings, or potentially gain access to sensitive customer data. The vulnerability's presence across multiple versions indicates that the underlying architectural flaw has not been properly addressed, leaving users exposed to attacks that could result in significant business disruption. Organizations relying on this appointment scheduling system may experience unauthorized service bookings, revenue loss from fraudulent appointments, and potential compliance violations if customer data is compromised. The vulnerability also creates opportunities for attackers to escalate their privileges or perform other malicious activities within the application's operational scope, potentially leading to broader system compromise.
Mitigation strategies for CVE-2025-31601 should focus on implementing robust anti-CSRF protection mechanisms including the use of unique, unpredictable tokens for each user session that must be validated on every state-changing request. Organizations should deploy proper referer header validation, implement SameSite cookie attributes, and ensure that all critical operations require explicit user confirmation before execution. The application should enforce strict origin validation checks and implement comprehensive session management controls that prevent unauthorized requests from being processed. Security patches should be applied immediately to upgrade to versions that contain proper CSRF protection mechanisms, while organizations should also consider implementing additional monitoring and logging controls to detect suspicious activities that may indicate CSRF attacks. Network-level protections such as web application firewalls can provide additional layers of defense, though these should not be relied upon as the sole protection mechanism. Regular security assessments and penetration testing should be conducted to identify similar vulnerabilities within the application ecosystem, ensuring that the anti-CSRF measures remain effective against evolving attack vectors.