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CVE-2026-96822 – Unauthenticated SQL Injection – Books Gallery WordPress Plugin ≤ 4.8.3

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Summary

CVE-2026-96822 is a critical unauthenticated SQL injection vulnerability affecting the Books Gallery WordPress plugin, versions up to and including 4.8.3. The flaw allows a remote, unauthenticated attacker to inject malicious SQL via the plugin, enabling blind SQL injection against the underlying WordPress database. It carries a CVSS v3.1 base score of 9.3 (Critical).

Technical details

  • Root cause: Improper neutralization of user-supplied input used in SQL queries (CWE-89) within the Books Gallery plugin.
  • Trigger conditions: No authentication is required to exploit the flaw; an attacker only needs network access to a WordPress site running the vulnerable plugin.
  • Attack vector: Network (remotely exploitable), low attack complexity, no privileges or user interaction required.
  • Impact: Blind SQL injection can be leveraged to extract or infer data from the site’s database (high confidentiality impact); some degradation of availability is also possible. The vulnerability does not directly affect data integrity.

Affected software

  • Books Gallery WordPress plugin (developed by Hossni Mubarak), versions up to and including 4.8.3.
  • Fixed in version 4.8.4.

Severity

  • CVSS v3.1 Base Score: 9.3 (Critical)
  • Vector: 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 Books Gallery WordPress plugin to version 4.8.4 or later, which addresses the SQL injection flaw.
  • If unable to patch immediately: Restrict or disable the Books Gallery plugin until the update can be applied, and monitor web server/database logs for anomalous or malformed query patterns targeting the plugin’s endpoints. A web application firewall rule blocking SQL injection payloads directed at the plugin can provide temporary interim protection.

References

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