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CVE-2026-18946 – Unauthenticated Sensitive File Disclosure – Contact Form to Any API WordPress Plugi

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Summary

CVE-2026-18946 is an information exposure vulnerability (CWE-200) in the Contact Form to Any API WordPress plugin. The plugin does not use random filenames when copying files uploaded through contact forms into a publicly accessible directory, allowing unauthenticated attackers to enumerate and download files submitted by other users. It affects all versions before 3.0.7 and is rated High severity (CVSS 7.5).

Technical details

  • Root cause: Files uploaded via contact forms are copied into a publicly accessible directory using predictable, non-random filenames.
  • Trigger conditions: No authentication required; an attacker can request the predictably named files directly over the network.
  • Attack vector: Network (remote, unauthenticated). Attackers enumerate the predictable filenames to retrieve stored uploads.
  • Impact: Unauthorized disclosure of files submitted by other users through contact forms, compromising the confidentiality of potentially sensitive user data. No integrity or availability impact.

Affected software

  • Contact Form to Any API WordPress plugin: all versions before 3.0.7.

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 Contact Form to Any API plugin to version 3.0.7 or later, which replaces the predictable upload filename with a randomly generated token.
  • If no patch can be applied: Restrict public access to the plugin’s uploads directory at the web server level, and consider disabling file uploads through affected contact forms 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/contact-form-to-any-api/

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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  • Confirmation of verified exploitable assets
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