CVE-2025-51682: Mjobtime Auth Bypass Vulnerability

CVE-2025-51682 Overview

CVE-2025-51682 affects mJobtime time management software version 15.7.2. The application enforces authorization on the client side, allowing attackers to modify client-side code and access administrative features. Attackers can also craft direct requests to administrative functions by analyzing the exposed client-side logic. The vulnerability is classified under [CWE-602: Client-Side Enforcement of Server-Side Security]. No authentication or user interaction is required to exploit this flaw over the network.

Critical Impact
Unauthenticated attackers can bypass authorization controls to access administrative functionality in mJobtime 15.7.2, compromising confidentiality, integrity, and availability of the application.

Affected Products

mJobtime 15.7.2
CPE: cpe:2.3:a:mjobtime:mjobtime:15.7.2
Vendor: mjobtime

Discovery Timeline

2025-12-01 - CVE-2025-51682 published to NVD
2025-12-04 - Last updated in NVD database
Advisory published by Infoguard Labs

Technical Details for CVE-2025-51682

Vulnerability Analysis

The vulnerability is a broken access control flaw rooted in client-side authorization enforcement. mJobtime 15.7.2 ships authorization logic to the browser, where the client determines which administrative features a user can access. Attackers can modify the JavaScript or other client-side resources to unlock administrative UI elements. The server does not independently validate whether the requesting user holds administrative privileges.

This design also exposes administrative endpoint definitions in client-side code. Attackers can inspect the code to enumerate administrative API endpoints. They can then craft HTTP requests directly to those endpoints, bypassing the user interface entirely. The vulnerability is paired in the vendor advisory with CVE-2025-51683, which describes follow-on SQL injection leading to remote code execution.

Root Cause

The root cause is improper trust placement. The application relies on the client to enforce authorization rather than performing server-side authorization checks on each administrative request. This violates the principle that all security decisions must be enforced on a trusted server boundary, as described in [CWE-602].

Attack Vector

An attacker accesses the mJobtime application over the network without credentials. They modify client-side code in the browser or replay administrative API calls discovered through static analysis of the delivered JavaScript. Because no server-side authorization gate exists, the server processes these requests as legitimate administrative actions. Refer to the Infoguard Security Advisory for technical details.

Detection Methods for CVE-2025-51682

Indicators of Compromise

Unexpected administrative API calls from user accounts that lack administrative roles in audit logs.
HTTP requests to administrative endpoints originating from sessions that never authenticated as administrators.
Modification of user records, configuration data, or permission tables outside maintenance windows.
Anomalous outbound responses containing administrative data delivered to non-admin sessions.

Detection Strategies

Enable verbose server-side logging on all administrative endpoints, capturing the requesting user, session, and source IP.
Correlate administrative function invocations against the role assigned to the calling session.
Monitor for direct HTTP requests to administrative URLs that bypass the standard UI navigation flow.

Monitoring Recommendations

Forward mJobtime web server and application logs to a centralized SIEM for correlation.
Alert on any HTTP 200 response from administrative endpoints to a session without administrative claims.
Track request rate spikes to administrative paths as a signal of enumeration or scripted abuse.

How to Mitigate CVE-2025-51682

Immediate Actions Required

Restrict network access to mJobtime 15.7.2 to trusted users via VPN or IP allowlisting until a patch is available.
Contact the mjobtime vendor through mjobtime.com to obtain a fixed version or remediation guidance.
Review web server access logs for prior unauthorized administrative requests.

Patch Information

No vendor patch URL is listed in the NVD entry at publication. Administrators should monitor the Infoguard advisory and vendor communications for updated builds beyond version 15.7.2.

Workarounds

Place mJobtime behind a reverse proxy or web application firewall that enforces server-side authorization on administrative URL paths.
Block external access to known administrative endpoints at the network perimeter.
Audit and rotate credentials for any account that may have been exposed through unauthorized administrative access.

bash

# Example: restrict access to admin paths at the reverse proxy
location /admin/ {
    allow 10.0.0.0/8;
    deny all;
    proxy_pass http://mjobtime-backend;
}