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CVE-2026-18352 – Unauthenticated Arbitrary File Read (Path Traversal) – WordPress User Access Manage

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Summary

CVE-2026-18352 is a directory traversal (path traversal) vulnerability in the WordPress User Access Manager plugin (by gm_alex) affecting all versions up to and including 2.3.15. It allows unauthenticated attackers to read arbitrary files on the server, exposing sensitive information, and is rated High severity (CVSS 7.5).

Technical details

  • Root cause: Improper limitation of a pathname to a restricted directory (CWE-22) in the plugin’s file delivery logic. When the WordPress function attachment_url_to_postid() returns 0 for a traversal path, the plugin falls back to the global post set by a valid attachment_id parameter supplied by the attacker. The access check then passes against a legitimate public attachment while the file actually streamed is the attacker-chosen path.
  • Trigger conditions: A crafted request supplying a traversal path via the uamgetfile parameter together with a valid attachment_id for a publicly accessible attachment. No authentication or user interaction is required.
  • Attack vector: Network. Remotely exploitable by an unauthenticated attacker.
  • Impact: Disclosure of arbitrary files on the server (confidentiality). No integrity or availability impact.

Affected software

  • User Access Manager plugin for WordPress (gm_alex): all versions up to and including 2.3.15.

Severity

  • CVSS v3.1 base score: 7.5 (High)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Mitigation and recommended actions

  • Immediate: Update the User Access Manager plugin to 2.3.16 or later (2.3.17 is the latest release and includes further security fixes).
  • If no patch can be applied: Deactivate and remove the plugin, or restrict access to its file-delivery endpoint (the uamgetfile parameter) at the web server or WAF layer until the update is applied.

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/user-access-manager/

References

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Map your entire attack surface (continously)

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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

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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.

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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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