CVE intelligence and bounded remediation

CVE-2025-42605 — This vulnerability exists in Meon Bidding Solutions due to improper authorization controls on certain API endpoints for the initiation...

Critical CVSS 9.3

This vulnerability exists in Meon Bidding Solutions due to improper authorization controls on certain API endpoints for the initiation, modification, or cancellation operations. An authenticated remote attacker could exploit this vulnerability by manipulating parameter in the API request body to gain unauthorized access to other user accounts. Successful exploitation of this vulnerability could allow remote attacker to perform authorized manipulation of data associated with other user accounts.

Severity
Critical
CVSS
9.3 (4.0)
Published
2025-04-23
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-639

Affected products

No browser-safe affected-product rows are available.

Matched remediation archetype

Authorization bypass, IDOR, and cross-tenant access

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Map object and action authorization checks across API, UI, batch, import/export, and background-job paths.
  • Identify tenant, ownership, role, and policy boundaries for affected resources and administrative operations.
  • Use synthetic fixtures to compare intended access matrices without accessing another user's real data.

Remediate safely

  • Enforce server-side authorization at each resource access and state transition using the authenticated principal and trusted tenant context.
  • Scope data queries by tenant and ownership; treat client-supplied identifiers, roles, and policy claims as untrusted.
  • Add deny-by-default policy tests for horizontal and vertical access across every affected transport.

Authoritative sources

Complete CVE record and remediation plan

The detailed catalog view below loads this exact record, its source evidence, and the full seven-phase agentic change plan.