EUVD-2026-280177

fkie_cve-2026-34737

WWBN AVideo is an open source video platform. In versions 26.0 and prior, the StripeYPT plugin includes a test.php debug endpoint that is accessible to any logged-in user, not just administrators. This endpoint processes Stripe webhook-style payloads and triggers subscription operations, including cancellation. Due to a bug in the retrieveSubscriptions() method that cancels subscriptions instead of merely retrieving them, any authenticated user can cancel arbitrary Stripe subscriptions by providing a subscription ID. At time of publication, there are no publicly available patches.

GHSA-38rh-4v39-vfxv — AVideo: Arbitrary Stripe Subscription Cancellation via Debug Endpoint and retrieveSubscriptions() Bug

Affected: Packagist: wwbn/avideo

## Summary

The StripeYPT plugin includes a `test.php` debug endpoint that is accessible to any logged-in user, not just administrators. This endpoint processes Stripe webhook-style payloads and triggers subscription operations, including cancellation. Due to a bug in the `retrieveSubscriptions()` method that cancels subscriptions instead of merely retrieving them, any authenticated user can cancel arbitrary Stripe subscriptions by providing a subscription ID.

## Details

At `plugin/StripeYPT/test.php:4`, the endpoint checks only for a logged-in user, not for admin privileges:

```php if (!User::isLogged()) ```

At lines 27-29, the endpoint accepts a JSON payload from the request and processes it through the Stripe metadata handler:

```php $obj = StripeYPT::getMetadataOrFromSubscription(json_decode($_REQUEST['payload'])); ```

The call chain proceeds as follows: - `test.php` calls `getMetadataOrFromSubscription()` - Which calls `getSubscriptionId()` to extract the subscription ID - Which calls `retrieveSubscriptions()` to interact with the Stripe API

At `StripeYPT.php:933`, the `retrieveSubscriptions()` method contains a critical bug where it cancels the subscription instead of just retrieving it:

```php $response = $sub->cancel(); ```

This same bug also affects the production webhook processing path via `processSubscriptionIPN()`, meaning both the debug endpoint and the live webhook handler can trigger unintended cancellations.

## Proof of Concept

1. Log in as any re…

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EUVD-2026-280177

fkie_cve-2026-34737

GHSA-38rh-4v39-vfxv — AVideo: Arbitrary Stripe Subscription Cancellation via Debug Endpoint and retrieveSubscriptions() Bug