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CVE-2026-66662 – Unauthenticated Privilege Escalation – Frontend Admin by DynamiApps WordPress Plugi

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Summary

CVE-2026-66662 is an unauthenticated privilege escalation vulnerability in the Frontend Admin by DynamiApps WordPress plugin (slug acf-frontend-form-element) in all versions up to and including 3.29.10. The flaw stems from incorrect privilege assignment (CWE-266) and allows an unauthenticated, network-based attacker to gain elevated permissions. It carries a CVSS v3.1 base score of 9.8 (Critical).

Technical details

  • Root cause: Incorrect privilege assignment (CWE-266) in the plugin’s frontend form handling, allowing users to obtain permissions they should not be granted.
  • Trigger conditions: Exploitable by an unauthenticated actor with no user interaction and no prior privileges.
  • Attack vector: Network (remote, over HTTP/HTTPS to the affected WordPress site).
  • Impact: Privilege escalation leading to full compromise of confidentiality, integrity, and availability of the affected site.

Affected software

  • Frontend Admin by DynamiApps (plugin slug acf-frontend-form-element) — all versions up to and including 3.29.10.

Severity

  • CVSS v3.1 base score: 9.8 (Critical)
  • Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate: At the time of writing, 3.29.10 is the latest released version and no fixed version is available. Monitor the vendor for a release above 3.29.10 and upgrade as soon as a patched version is published.
  • If no patch: Deactivate and remove the plugin until a fix is released. Where the plugin must remain active, restrict access to frontend form endpoints, place the site behind a web application firewall with rules to block anomalous form submissions, and audit user accounts and roles for unexpected privilege changes.

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-frontend-form-element/

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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