CVE-2026-23622 is a high-severity vulnerability affecting easyappointments, a self-hosted appointment scheduling application. This vulnerability allows attackers to bypass Cross-Site Request Forgery (CSRF) protections due to improper enforcement in versions 1.5.2 and earlier. Specifically, the application only enforces CSRF for POST requests and does not adequately handle GET requests, enabling potential exploitation.
The CVSS score of 7.4 indicates a high severity level, signaling significant risk to organizations that utilize this software. The low attack complexity and requirement for passive user interaction further heighten the urgency for remediation. Attackers may leverage this vulnerability to perform state-changing operations, including creating admin accounts, modifying admin credentials, and achieving full admin account takeover.
Organizations should prioritize patching immediately to mitigate this vulnerability and safeguard against unauthorized access. The potential impacts include loss of sensitive data and disruption of services, as attackers can exploit the vulnerability to fully control admin accounts.
As of now, no public exploits have been confirmed for this vulnerability, but the risk remains high due to its nature and the potential for exploitation in live environments.
Vulnerability Details
Easy!Appointments is a self-hosted appointment scheduler. In versions 1.5.2 and earlier, the function application/core/EA_Security.php::csrf_verify() is vulnerable as it only applies CSRF protections to POST requests and returns early for other request methods. This oversight allows state-changing operations via crafted GET requests. The impact includes the creation of admin accounts, modification of admin email/password, and complete admin account takeover.
This vulnerability has a CVSS score of 7.4, classified as high severity. The affected products include easy!appointments versions up to and including 1.5.2. The vulnerability was published on January 15, 2026, and is categorized under CWE-352.
Technical Analysis
The root cause of CVE-2026-23622 lies in the CSRF protection mechanism, which fails to enforce security measures for GET requests. Attackers may exploit this flaw by sending a crafted GET request that executes unauthorized actions without the victim's consent. The attack vector is network-based, requiring low complexity for successful exploitation.
No privileges are required for exploitation, making this vulnerability particularly dangerous. User interaction is passive, meaning the victim only needs to visit a maliciously crafted URL for the attack to succeed. The potential impacts on confidentiality, integrity, and availability are high, as attackers may gain complete administrative control.
Risk & Impact Analysis
The real-world risk posed by CVE-2026-23622 is significant due to the nature of the vulnerability. Organizations using easyappointments could face unauthorized access to sensitive data and critical functionalities. The potential for admin account takeover could lead to further exploitation, including data breaches and service interruptions.
Given the high CVSS score and the absence of public exploits, organizations should assess their deployment of easyappointments and prioritize patching in their security management processes. The blast radius of this vulnerability could impact multiple areas within organizational operations, emphasizing the need for immediate action.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions of easyappointments include all versions prior to the vendor patch, specifically version 1.5.2.
Mitigation & Remediation
Organizations should implement the following mitigation strategies: apply the latest patches provided by easyappointments, and if a patch is unavailable, consider workarounds such as restricting access to sensitive endpoints and implementing additional CSRF protections. Network controls and monitoring should be enhanced to detect anomalous behavior.
For security assessments, organizations can validate remediation through penetration testing to ensure that all vulnerabilities have been addressed.
Detection Guidance
Monitor logs for indicators of unauthorized access attempts and unusual account activity. Behavioral anomalies related to state-changing operations should be flagged, and network signatures for known exploitation patterns can help in early detection.
AppSecure Threat Intelligence Insight
CVE-2026-23622 highlights the ongoing challenges in securing web applications against CSRF vulnerabilities. The ease of exploitation through crafted GET requests underscores the importance of robust CSRF protection mechanisms.
For further information on managing vulnerabilities and enhancing application security, organizations may find value in our resources on vulnerability management programs and penetration testing methodologies essential for proactive security postures.
Additionally, engaging in web application security testing can further enhance defenses against such vulnerabilities.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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