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CVE-2026-57707 – Unauthenticated SQL Injection – Simple Business Directory Pro (WordPress Plugin)…

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Summary

CVE-2026-57707 is a critical unauthenticated SQL injection vulnerability affecting the Simple Business Directory Pro WordPress plugin by QuantumCloud, in all versions up to and including 15.9.4. The flaw allows a remote, unauthenticated attacker to inject malicious SQL commands over the network and extract sensitive data from the underlying WordPress database. With a CVSS v3.1 base score of 9.3 (Critical), this vulnerability requires no authentication and no user interaction to exploit.

Technical details

  • Root cause: Improper neutralization of special elements used in an SQL command (CWE-89). User-supplied input is not adequately sanitized or escaped before being incorporated into database queries.
  • Trigger conditions: An unauthenticated attacker sends a crafted HTTP request to a vulnerable plugin endpoint. No account credentials or prior access are needed.
  • Attack vector: Network-accessible (AV:N), with low attack complexity (AC:L) — the plugin generates publicly-facing business directory pages, making the vulnerable functionality reachable from the internet without any special configuration.
  • Impact: A changed scope (S:C) with high confidentiality impact (C:H) and low availability impact (A:L) — successful exploitation can expose the full contents of the WordPress database, including user credentials, personal data, and sensitive application records.

Affected software

  • Simple Business Directory Pro (WordPress plugin by QuantumCloud) — versions n/a through 15.9.4 (all versions up to and including 15.9.4)

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 action: Update Simple Business Directory Pro to version 15.9.5 or later, which contains the vendor-provided fix for this vulnerability.
  • Audit your WordPress environment: Identify all sites running the Simple Business Directory Pro plugin and verify the installed version via the WordPress admin dashboard (Plugins → Installed Plugins).
  • If immediate patching is not possible: Consider temporarily disabling the plugin on internet-exposed WordPress sites until the update can be applied, and review database access logs for anomalous query patterns.

IONIX Status

The IONIX research team is tracking ongoing exploitation attempts and recommends immediate patching. Potentially affected assets are outlined in this post.

References

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