# Paid Membership Subscriptions – Effortless Memberships, Recurring Payments & Content Restriction <= 3.1.3 - Unauthenticated Reflected Cross-Site Scripting via Profile Builder PayPal Redirect

- **ID:** WPSEC-2026-2333
- **Plugin:** Paid Membership Subscriptions – Effortless Memberships, Recurring Payments & Content Restriction (`paid-member-subscriptions`), https://wordpress.org/plugins/paid-member-subscriptions/
- **Affected versions:** all versions before 3.1.4
- **Fixed in:** 3.1.4 (Update to 3.1.4 or later.)
- **Severity:** Medium 4.7 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N)
- **Weakness:** CWE-79
- **Usage among sites WPSec scans:** plugin Medium, affected versions Medium (as of 2026-11-03)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/paid-member-subscriptions
- **Fix released:** 2026-11-02
- **Published:** 2026-11-03
- **URL:** https://wpsec.com/vuln/WPSEC-2026-2333/

## Description

The Paid Membership Subscriptions plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the Profile Builder PayPal redirect message in all versions up to, and including, 3.1.3, due to insufficient output escaping of the redirect URL placed in a meta refresh tag. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link, on sites where the Profile Builder plugin is active, registration pays through PayPal Standard, and Profile Builder's automatic login after registration is enabled with a non-zero redirect delay.

## References

- https://wpsec.com/vuln/WPSEC-2026-2333/
- https://plugins.svn.wordpress.org/paid-member-subscriptions/tags/3.1.4/
- https://wordpress.org/plugins/paid-member-subscriptions/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-2333/

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.