Better Payment <= 2.4.1 - Unauthenticated Open Redirect via PayPal 'return' and 'cancel_return' Parameters
- ID
- WPSEC-2026-1009
- Plugin
- Better Payment – Instant Payments, Donations, Fundraising with Subscriptions & More (better-payment)
- Affected
- all versions before 2.4.2
- Remediation
- Update to 2.4.2 or later.
- CVSS 3.1
- CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
- Weakness
- CWE-601
- Usage
- Plugin Low · Affected versions Low among sites WPSec scans, 2026-10-15
- Attack surface
- Better Payment on WPSec AttackSurface
- Fix released
- Published
Description
The Better Payment plugin for WordPress is vulnerable to Open Redirect via the 'return' and 'cancel_return' parameters of the Elementor form's PayPal handler in all versions up to, and including, 2.4.1, due to the URLs being passed to PayPal after only esc_url_raw(), without a check that they point to the site. The handler is open to logged-out users and its nonce is printed on the public payment form. This makes it possible for unauthenticated attackers to send a logged-out visitor who submits a crafted payment form through PayPal to an arbitrary external site once the payment is completed or cancelled.
References
- https://wpsec.com/vuln/WPSEC-2026-1009/
- https://plugins.svn.wordpress.org/better-payment/tags/2.4.2/
- https://wordpress.org/plugins/better-payment/
Published by WPSec. Provided as is, without warranty. Corrections: contact us.
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