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CVE-2026-18473 – Unauthenticated SQL Injection – WP Directory Kit WordPress Plugin before 1.5.5

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Summary

CVE-2026-18473 is an unauthenticated SQL injection vulnerability in the WP Directory Kit WordPress plugin. Versions before 1.5.5 fail to properly sanitize and escape a user-supplied parameter before using it in a SQL statement, allowing remote attackers to inject arbitrary SQL without authentication. It carries a CVSS v3.1 base score of 9.1 (Critical).

Technical details

  • Root cause: the plugin does not properly sanitize and escape the field_search parameter before using it in a SQL statement (CWE-89).
  • Trigger conditions: no authentication is required to reach the vulnerable code path.
  • Attack vector: network — the flaw is exploitable remotely by unauthenticated users.
  • Impact: injection of arbitrary SQL, enabling unauthorized read and modification of the site’s backend database (high confidentiality and integrity impact).

Affected software

  • WP Directory Kit WordPress plugin: all versions before 1.5.5 (confirmed in 1.5.4 and earlier).
  • Fixed in version 1.5.5.

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: upgrade the WP Directory Kit plugin to version 1.5.5 or later.
  • If no patch can be applied immediately: restrict or filter requests to the plugin’s search functionality and deploy a web application firewall rule to block SQL injection payloads targeting the affected parameter.

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/wpdirectorykit/

References

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How IONIX’s External Exposure Management Platform Detects and Validates
Zero-Days to Shrink MTTR

1

Map your entire attack surface (continously)

IONIX uses multi-factor discovery methods, including DNS analysis, certificate mapping, metadata inspection, and more, to automatically map every internet-facing asset across your environment. This includes cloud instances, third-party platforms, shadow IT, and even forgotten infrastructure that traditional tools miss.

2

Monitor for new CVEs

Dozens of threat intel feeds using agentic technology are continuously analyzed to detect the appearance of proof-of-concept code, exploit kits, and indicators of active targeting. IONIX goes further by applying AI to proactively evaluate whether emerging vulnerabilities are likely to be exploited, even before PoCs go public.

3

Identify Potential External Exposures

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

Execute Exploit Validations

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

Drive Fast and Actionable Remediation

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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  • Identification of potentially exposed assets to this CVE
  • Confirmation of verified exploitable assets
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