CVE intelligence and bounded remediation

CVE-2025-21557 — Vulnerability in Oracle Application Express (component: General)

Medium CVSS 5.4

Vulnerability in Oracle Application Express (component: General). Supported versions that are affected are 23.2 and 24.1. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Application Express. Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Oracle Application Express, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle Application Express accessible data as well as unauthorized read access to a subset of Oracle Application Express accessible data. CVSS 3.1 Base Score 5.4 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N).

Severity
Medium
CVSS
5.4 (3.1)
Published
2025-01-21
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-863

Affected products

  • oracle / application_express / 23.2
  • oracle / application_express / 24.1

Matched remediation archetype

Authorization bypass, IDOR, and cross-tenant access

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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

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