CVE intelligence and bounded remediation

CVE-2021-24978 — B4After Osmapper security vulnerability

Medium CVSS 5.3

The OSMapper WordPress plugin through 2.1.5 contains an AJAX action to delete a plugin related post type named 'map' and is registered with the wp_ajax_nopriv prefix, making it available to unauthenticated users. There is no authorisation, CSRF and checks in place to ensure that the post to delete is a map one. As a result, unauthenticated user can delete arbitrary posts from the blog

Severity
Medium
CVSS
5.3 (3.1)
Published
2022-03-28
CISA KEV
Not currently listed
Ecosystem
php/wordpress
Weaknesses
CWE-862, CWE-352

Affected products

  • b4after / osmapper

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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