CVE-2023-36136 in Class Scheduling System
Summary
by MITRE • 08/08/2023
PHPJabbers Class Scheduling System 1.0 lacks encryption on the password when editing a user account (update user page) allowing an attacker to capture all user names and passwords in clear text.
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Analysis
by VulDB Data Team • 01/12/2026
The PHPJabbers Class Scheduling System version 1.0 contains a critical security vulnerability that exposes user credentials through insufficient data encryption during account modification processes. This vulnerability specifically affects the update user page functionality where password information is transmitted without proper encryption mechanisms, creating an exploitable condition that compromises the confidentiality of authentication data. The flaw represents a fundamental failure in secure communication practices within the web application's user management interface.
This vulnerability stems from the application's failure to implement transport layer security measures when processing user account updates. The system transmits password data in plaintext format over the network, making it susceptible to interception by malicious actors who can capture and decode the credentials using standard network monitoring tools. The vulnerability directly relates to CWE-312, which addresses the exposure of sensitive information through improper encryption or lack of encryption in data transmission. The absence of HTTPS implementation or equivalent security measures on the update user page creates an attack surface that allows unauthorized parties to observe and extract authentication credentials during the account modification process.
The operational impact of this vulnerability extends beyond simple credential theft, as it provides attackers with persistent access to user accounts within the scheduling system. Once compromised credentials are obtained, adversaries can manipulate user accounts, modify scheduling information, and potentially escalate privileges within the application. This vulnerability aligns with ATT&CK technique T1566, which involves the exploitation of unsecured network communications to obtain credentials, and T1078, which covers legitimate credential use for unauthorized access. The exposure of clear text passwords creates a significant risk for organizations relying on this scheduling system, particularly in environments where network traffic is not properly secured or monitored.
Organizations using this software should immediately implement mitigation strategies including mandatory HTTPS enforcement for all user management functions, implementation of strong encryption protocols for data transmission, and immediate credential rotation for all affected accounts. The system requires comprehensive security auditing to identify other potential endpoints that may be vulnerable to similar issues, and network segmentation should be implemented to limit the scope of potential credential compromise. Additionally, the application should be updated to enforce secure communication protocols and implement proper input validation to prevent further exploitation. Security monitoring should be enhanced to detect unusual network traffic patterns that may indicate credential interception attempts, and regular security assessments should be conducted to identify and remediate similar vulnerabilities in the application's architecture.