CyberSecBulletin
CVE-2025-51682NVD status: Modified

Mjobtime: Client-Side Enforcement of Server-Side Security

Published Updated By the CyberSecBulletin desk

CVE-2025-51682 is a critical-severity client-side enforcement of server-side security vulnerability in Mjobtime, with a CVSS 3.1 base score of 9.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected Mjobtime versions: 15.7.2. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 1.73% chance of exploitation within 30 days, higher than 78% of scored CVEs.

Patch this week

Critical severity: a successful attack would have severe impact.

What to do

  1. Check which version of Mjobtime you run against the affected versions below, and install the vendor's latest release.
  2. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.

Affected products and versions

VendorProductAffected versionsFixed in
MjobtimeMjobtime15.7.2Not stated

Version data comes from NVD's product matching. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
NoneNo account or login is needed.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
HighData or code can be modified at will.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by CISA (ADP).

Official description

mJobtime 15.7.2 handles authorization on the client side, which allows an attacker to modify the client-side code and gain access to administrative features. Additionally, they can craft requests based on the client-side code to call these administrative functions directly.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Client-Side Enforcement of Server-Side Security

The product includes a server that relies on the client to implement a protection mechanism that is intended to protect the server.

How developers prevent this class of flaw

  • If some degree of trust is required between the two entities, then use integrity checking and strong authentication to ensure that the inputs are coming from a trusted source. Design the product so that this trust is managed in a centralized fashion, especially if there are complex or numerous communication channels, in order to reduce the risks that the implementer will mistakenly omit a check in a single code path.

More Client-Side Enforcement of Server-Side Security vulnerabilities (CWE-602)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: poc, automatable: yes, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Technical write-ups (may include proof of concept)

Other vulnerabilities in Mjobtime

All Mjobtime vulnerabilities

Recent Client-Side Enforcement of Server-Side Security vulnerabilities

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