CyberSecBulletin
CVE-2025-8855NVD status: Deferred

Brokerage Automation: Authentication Bypass by Assumed-Immutable Data

Published Updated By the CyberSecBulletin desk

CVE-2025-8855 is a high-severity authentication bypass by assumed-immutable data vulnerability in Brokerage Automation from Optimus Software, with a CVSS 3.1 base score of 8.1 out of 10. It can be exploited remotely over the network by an attacker with a low-privileged account, without any action from a user. The record lists version 1.1.71 as the first without the flaw, so updating Brokerage Automation to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.39% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update Brokerage Automation to 1.1.71 or a later version.

Affected products and versions

VendorProductAffected versionsFixed in
Optimus SoftwareBrokerage Automationbefore 1.1.711.1.71

Version data comes from the organisation that assigned the CVE. 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
LowA basic user account is enough.
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
NoneAvailability is not affected.

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N. Scored by CNA (usom.gov.tr).

Official description

Authorization Bypass Through User-Controlled Key, Weak Password Recovery Mechanism for Forgotten Password, Authentication Bypass by Assumed-Immutable Data vulnerability in Optimus Software Brokerage Automation allows Exploiting Trust in Client, Authentication Bypass, Manipulate Registry Information. This issue affects Brokerage Automation: before 1.1.71.

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

The underlying weakness: Authentication Bypass by Assumed-Immutable Data

The authentication scheme or implementation uses key data elements that are assumed to be immutable, but can be controlled or modified by the attacker.

How developers prevent this class of flaw

  • Implement proper protection for immutable data (e.g. environment variable, hidden form fields, etc.)

More Authentication Bypass by Assumed-Immutable Data vulnerabilities (CWE-302)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Recent Authentication Bypass by Assumed-Immutable Data vulnerabilities

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