CVE-2023-1367 in easyappointments
Summary
by MITRE • 03/13/2023
Code Injection in GitHub repository alextselegidis/easyappointments prior to 1.5.0.
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Analysis
by VulDB Data Team • 07/06/2025
The vulnerability identified as CVE-2023-1367 represents a critical code injection flaw discovered in the alextselegidis/easyappointments GitHub repository affecting versions prior to 1.5.0. This open source appointment scheduling application is widely used by businesses and organizations for managing customer appointments and bookings. The vulnerability stems from insufficient input validation and sanitization within the application's processing logic, creating an avenue for malicious actors to inject arbitrary code into the system. The flaw specifically manifests when user-supplied data is not properly escaped or validated before being processed by the application's backend components, potentially allowing attackers to execute unauthorized commands on the affected server.
The technical implementation of this code injection vulnerability occurs through improper handling of user inputs that are directly incorporated into the application's execution flow. Attackers can exploit this weakness by submitting malicious payloads through various input fields within the application interface, including appointment booking forms, user registration sections, or administrative configuration parameters. When the application processes these inputs without adequate sanitization measures, the malicious code becomes part of the execution context, potentially enabling remote code execution capabilities. This vulnerability aligns with CWE-94, which specifically addresses "Improper Control of Generation of Code ('Code Injection')" and falls under the broader category of injection flaws that represent one of the most prevalent and dangerous security weaknesses in web applications.
The operational impact of CVE-2023-1367 extends beyond simple data compromise, as successful exploitation could result in complete system takeover and persistent backdoor access. An attacker who successfully exploits this vulnerability could gain unauthorized access to the application's database, potentially leading to data theft, modification of appointment records, and unauthorized user account access. The implications are particularly severe for organizations relying on easyappointments for critical business operations, as the vulnerability could enable attackers to disrupt services, manipulate scheduling data, or establish persistent access points within the organization's infrastructure. This type of vulnerability also provides attackers with opportunities to escalate privileges and move laterally within network environments where the application is deployed.
Organizations utilizing the easyappointments application must immediately implement comprehensive mitigation strategies to address this vulnerability. The primary and most effective remediation involves upgrading to version 1.5.0 or later, which includes proper input validation and sanitization measures that prevent code injection attacks. Additionally, implementing web application firewalls and input filtering mechanisms can provide additional layers of protection while awaiting the official update. Security practitioners should also conduct thorough code reviews to identify similar injection vulnerabilities within custom modifications or extensions of the application. The remediation process should include monitoring for suspicious activities and implementing proper access controls to limit potential exploitation impact. According to ATT&CK framework, this vulnerability maps to T1059.001 which covers "Command and Scripting Interpreter: PowerShell" and T1059.007 which addresses "Command and Scripting Interpreter: JavaScript", highlighting the execution vectors that attackers may leverage through such code injection flaws. Organizations should also consider implementing principle of least privilege access controls and regular security assessments to prevent similar vulnerabilities from emerging in other components of their software infrastructure.