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CVE-2026-80467 – Unauthenticated Privilege Escalation to Administrator – Advanced Custom Fields: Ext

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Summary

CVE-2026-80467 is an improper privilege management vulnerability (CWE-269) in the Advanced Custom Fields: Extended WordPress plugin. Versions 0.9.2.2 through 0.9.2.6 fail to properly restrict the user role submitted through the plugin’s front-end user registration/insert forms, allowing an unauthenticated visitor to register an account with elevated capabilities and escalate it to administrator. The issue carries a CVSS v3.1 base score of 8.1 (High).

Technical details

  • Root cause: The plugin does not restrict the role value submitted through its front-end user forms to the roles the form actually offers; a safeguard against privileged roles introduced in version 0.9.2.2 is incomplete.
  • Trigger conditions: A site must expose a front-end user registration/insert form provided by the plugin; no authentication or user interaction from an admin is required.
  • Attack vector: Network — an unauthenticated attacker submits a crafted front-end form request specifying an elevated role.
  • Impact: Full compromise of confidentiality, integrity, and availability, as the attacker can register an account and escalate it to WordPress administrator, gaining full site control.

Affected software

  • Advanced Custom Fields: Extended (WordPress plugin, acf-extended), versions 0.9.2.2 through 0.9.2.6

Severity

  • CVSS v3.1 Base Score: 8.1 (High)
  • Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate: Update Advanced Custom Fields: Extended to version 0.9.2.7 or later, which fixes the front-end role restriction.
  • If no patch can be applied immediately: Disable or remove any front-end user registration/insert forms provided by the plugin, and audit existing WordPress user accounts for unexpected administrator-level accounts.

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/acf-extended/

References

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Map your entire attack surface (continously)

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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

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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.

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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