# User Frontend <= 4.3.13 - Authenticated (Subscriber+) Payment Bypass to Paid Subscription Pack Activation

- **ID:** WPSEC-2026-1948
- **Plugin:** User Frontend – Membership, User Registration, User Profile, User Directory & Content Restriction with Frontend Post Submission (`wp-user-frontend`), https://wordpress.org/plugins/wp-user-frontend/
- **Affected versions:** all versions before 4.3.14
- **Fixed in:** 4.3.14 (Update to 4.3.14 or later.)
- **Severity:** Medium 4.3 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N)
- **Weakness:** CWE-840
- **Usage among sites WPSec scans:** plugin Low, affected versions Low (as of 2026-10-29)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/wp-user-frontend
- **Fix released:** 2026-10-28
- **Published:** 2026-10-29
- **URL:** https://wpsec.com/vuln/WPSEC-2026-1948/

## Description

The User Frontend plugin for WordPress is vulnerable to a payment bypass in all versions up to, and including, 4.3.13, due to the PayPal gateway's free-checkout handling granting the submitted item ID as a subscription pack without checking the item type, while the missing form cost of a post-type payment resolves to zero. This makes it possible for authenticated attackers with subscriber-level access and above to activate a paid subscription pack without paying.

## References

- https://wpsec.com/vuln/WPSEC-2026-1948/
- https://plugins.svn.wordpress.org/wp-user-frontend/tags/4.3.14/
- https://wordpress.org/plugins/wp-user-frontend/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-1948/

License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Free to use, share and adapt, also commercially, if you credit WPSec and link to this advisory.