Attack Vectors

The vulnerability in NEX-Forms – Ultimate Forms Plugin for WordPress (slug: nex-forms-express-wp-form-builder) affects versions up to and including 9.1.8 and is rated Medium severity (CVSS 5.3). It involves missing authorization checks that can allow an unauthenticated attacker—someone with no WordPress login—to access exported form configuration data.

Based on the published details, the attacker would attempt to enumerate the nex_forms_Id parameter to locate and export form configurations. In practical terms, this means an outside party could try multiple IDs until they find forms they can export, without needing valid credentials.

Security Weakness

CVE-2025-15510 stems from a missing capability (permission) check in the NF5_Export_Forms class constructor within NEX-Forms – Ultimate Forms Plugin for WordPress versions <= 9.1.8. When a plugin feature that should be restricted to authenticated administrators is not properly gated, it can become accessible to the public internet.

This is categorized as an unauthorized sensitive information exposure issue: the weakness is not about taking over the site directly, but about exposing valuable configuration data that should remain internal.

Technical or Business Impacts

If exploited, this issue can expose exported form configurations that may include sensitive data such as email addresses, PayPal API credentials, and third-party integration keys. For executives and compliance teams, this creates a meaningful business-risk scenario: information intended to support marketing operations and payment or integration workflows could be accessed by unauthorized parties.

Business impacts can include unauthorized use of exposed credentials (leading to fraud or abuse in connected services), regulatory and contractual exposure if personal data is disclosed, incident response costs, and brand damage if customers or partners are notified of a preventable leak.

Remediation is straightforward: update NEX-Forms – Ultimate Forms Plugin for WordPress to version 9.1.9 or newer patched releases. CVE details: https://www.cve.org/CVERecord?id=CVE-2025-15510. Reference source: Wordfence vulnerability record.

Similar Attacks

Authorization gaps and unintended data exposure in widely used platforms are a recurring cause of breaches. A few notable, well-documented examples include:

Facebook/Cambridge Analytica (FTC background) — a high-profile example of data exposure and downstream misuse impacting consumer trust and regulatory scrutiny.

Twilio incident (FBI PSA) — demonstrates how access to internal systems or credentials can translate into broader business disruption and customer impact.

OWASP Top 10: Broken Access Control — an industry-standard reference describing how missing or incorrect access controls commonly lead to unauthorized data access in web applications.