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CVE-2026-16950 – Unauthenticated SQL Injection – Product Shortlist WordPress Plugin (≤ 1.0.4)

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Summary

CVE-2026-16950 is an unauthenticated SQL injection vulnerability (CWE-89) affecting the Product Shortlist plugin for WordPress, in all versions through 1.0.4. The plugin fails to properly sanitize and escape a user-supplied parameter before using it in a SQL statement, allowing remote, unauthenticated attackers to inject arbitrary SQL. The flaw carries a CVSS v3.1 base score of 8.6 (High) and requires no authentication or user interaction to exploit.

Technical details

  • Root cause: The plugin passes an attacker-controlled parameter directly into a SQL query without proper sanitization or escaping, enabling classic SQL injection.
  • Trigger conditions: No authentication or privileges are required; the vulnerable parameter can be reached and manipulated by any remote, unauthenticated visitor.
  • Attack vector: Network — exploitation occurs over HTTP(S) against a publicly reachable WordPress site running the vulnerable plugin.
  • Impact: The CVSS vector (AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N) indicates a scope change and high confidentiality impact, meaning a successful attack can be used to read data from the WordPress database (e.g., user credentials, configuration data) potentially beyond the plugin’s own component boundary. No direct integrity or availability impact is indicated by the scoring, but SQL injection flaws of this type are commonly leveraged as a foothold for further compromise.

Affected software

  • Product Shortlist WordPress plugin — all versions through 1.0.4 (0 – 1.0.4)

Severity

  • CVSS v3.1 Base Score: 8.6 (High)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Mitigation and recommended actions

  • Immediate: No patched version of Product Shortlist has been published. The plugin listing on the official WordPress.org Plugin Directory was closed on July 31, 2026 and is currently unavailable for download pending review — indicating there is no vendor-supported update to install.
  • If no patch: Security teams should immediately deactivate and remove the Product Shortlist plugin from all WordPress installations until a fixed release becomes available. If removal is not immediately feasible, restrict or block public access to the affected plugin endpoints via a Web Application Firewall (WAF) with SQL injection detection rules, and monitor database and web server logs for anomalous query patterns or injection attempts. Given the plugin is closed on the official repository, organizations should evaluate migrating to an actively maintained alternative.

References

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