# CVE-2026-90922: Paid Member Subscriptions payment bypass in PayPal integration

Source: https://junglewise.ai/threats/cve-2026-90922-paid-member-subscriptions-payment-bypass-in-paypal-integration  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-17. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-90922 · Severity: medium · CVSS 5.3 · Published 2026-09-17

The Paid Member Subscriptions WordPress plugin fails to validate that payment amounts and currency codes received from PayPal match the membership plan being purchased. An unauthenticated attacker can exploit this to pay a lower amount than required and still gain access to paid membership features, resulting in direct revenue loss and unauthorized service access.

## Quick answers

**Is CVE-2026-90922 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-90922 being exploited in the wild.

**How severe is CVE-2026-90922?** Medium severity, with a CVSS score of 5.3, published 17 September 2026.

**Which products and versions are affected?** Paid Member Subscriptions Paid Member Subscriptions before 3.0.9.

**Is there a fix for CVE-2026-90922?** A patch was published on 2026-09-17: Fixed in version 3.0.9 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-90922 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-90922?** Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The plugin contains an access control vulnerability (CWE-284) in its PayPal payment verification logic. When processing payment completion, it does not compare the amount and currency reported by the PayPal webhook against the original pending payment details. An unauthenticated attacker can intercept or manipulate the payment callback to specify an arbitrary lower amount and currency mismatch, which the plugin accepts without validation. This allows the attacker to obtain paid membership access without paying the correct fee. The vulnerability was fixed in version 3.0.9.

## Affected products

- Paid Member Subscriptions Paid Member Subscriptions before 3.0.9

## Timeline

- 2026-09-15: disclosed
- 2026-09-17: patched: Fixed in version 3.0.9

## References

- [https://wpscan.com/vulnerability/a7f3882a-81d7-4915-b83c-10480eba493a/](https://wpscan.com/vulnerability/a7f3882a-81d7-4915-b83c-10480eba493a/)