Simple Membership MailChimp Integration < 1.9.8 - API Key Update via CSRF (CVE-2026-8151) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-8151

Simple Membership MailChimp Integration < 1.9.8 - API Key Update via CSRF

Answer in brief

CVE-2026-8151 records a Unknown severity vulnerability in Simple Membership MailChimp Integration < 1.9.8 - API Key Update via CSRF. The current sources do not mark it as known exploited. The current feed maps Unknown/Simple Membership MailChimp Integration (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 2, 2026Updated Sep 2, 2026Source checked Sep 2, 2026First seen by HOL Sep 2, 2026Material review Sep 2, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Unknown/Simple Membership MailChimp Integration (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Unknown/Simple Membership MailChimp Integrationgeneric	>=0 <1.9.8	1.9.8

Recommended response

Check inventory. Check lockfiles and deployed manifests for Unknown/Simple Membership MailChimp Integration.
Review the reported fix. Update Unknown/Simple Membership MailChimp Integration to 1.9.8 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 2, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 2, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 2, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.