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CVE-2026-65520 – Unauthenticated SQL Injection – WP OAuth Server (miniOrange) WordPress Plugin <= 6.

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Summary

CVE-2026-65520 is an unauthenticated SQL injection vulnerability in the WP OAuth Server (miniOrange) WordPress plugin affecting versions 6.2.0 and earlier. An unauthenticated, remote attacker can inject malicious SQL through improperly neutralized input, exposing sensitive database contents. The issue is rated Critical with a CVSS v3.1 base score of 9.3.

Technical details

  • Root cause: Improper neutralization of special characters in an SQL command (CWE-89), allowing attacker-controlled input to alter database queries.
  • Trigger conditions: No authentication, privileges, or user interaction are required to exploit the flaw.
  • Attack vector: Network — the vulnerable functionality is reachable remotely over HTTP(S).
  • Impact: Blind SQL injection enabling extraction of sensitive data from the WordPress database (high confidentiality impact) with a low availability impact; scope is changed.

Affected software

  • WP OAuth Server (miniOrange, miniorange-oauth-20-server) — versions 6.2.0 and earlier.

Severity

  • CVSS v3.1 base score: 9.3 (Critical)
  • Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L

Mitigation and recommended actions

  • Immediate: Update the WP OAuth Server plugin to version 6.2.1 or later.
  • If no patch can be applied: Restrict access to the affected plugin endpoints using a WAF or network-layer controls, and monitor for anomalous requests indicative of SQL injection until the update is deployed.

References

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