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CVE-2026-16532 – Unauthenticated SQL Injection – Link Library WordPress plugin before 7.9.3

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Summary

CVE-2026-16532 is an unauthenticated SQL injection vulnerability in the Link Library plugin for WordPress. The plugin does not properly sanitise and escape a user-supplied value before using it in a SQL query, allowing unauthenticated attackers to inject arbitrary SQL through the front-end link submission form. It is rated Critical with a CVSS v3.1 base score of 9.1.

Technical details

  • Root cause: A user-supplied value is used in a SQL query without proper sanitisation, escaping, or parameterisation (CWE-89).
  • Trigger conditions: Exploitation occurs through the plugin’s public, front-end link submission form; no authentication is required.
  • Attack vector: Network — the flaw is reachable remotely by any unauthenticated user over HTTP/HTTPS with low complexity and no user interaction.
  • Impact: Attackers can inject malicious SQL to read and manipulate database contents, potentially exposing sensitive data such as stored user records.

Affected software

  • Link Library plugin for WordPress: all versions before 7.9.3.

Severity

  • CVSS v3.1 base score: 9.1 (Critical)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Mitigation and recommended actions

  • Immediate: Update the Link Library plugin to version 7.9.3 or later.
  • If no patch can be applied: Restrict or disable the front-end link submission form, and place a web application firewall in front of the site to filter SQL injection payloads targeting the submission endpoint.

How IONIX identifies potentially affected assets

IONIX matches the following signals against data already collected when it crawled the asset; identifying the technology sends no request beyond that crawl.

  • Raw response body: /wp-content/plugins/link-library/

References

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Zero-Days to Shrink MTTR

1

Map your entire attack surface (continously)

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2

Monitor for new CVEs

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3

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Not all CVEs matter. IONIX filters vulnerabilities by asking attacker-centric questions: Can it be reached from the internet? Does it require authentication? Is it being exploited in the wild? This dramatically reduces noise and focuses teams on threats that can actually be weaponized.

4

Create Safe, Scalable Exploit Validations

IONIX transforms real-world PoCs into safe, non-intrusive test payloads that can be run in production environments without disruption. These simulations are precisely targeted to the systems that are vulnerable, ensuring rapid validation without unnecessary load.

5

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By combining context about software stack, versioning, exposure status, and reachability, IONIX ensures that only the right payloads are executed against the right assets, maximizing efficiency and minimizing risk.

6

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Results are routed through integrations with ticketing, SOAR, and SIEM tools. Issues are written in plain language, bundled into remediation clusters, and prioritized based on asset criticality, exploitability, and blast radius. This shortens mean time to remediation (MTTR) and empowers teams to act with confidence.

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