Simple Membership MailChimp Integration < 1.9.8 - API Key Update via CSRF
Published Sep 2, 2026
5.4
MEDIUMCVSS 3.1
EPSS 0.14%
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.
Affected products
- Vendor n/a Product Simple Membership MailChimp Integration Defaultunaffected
- Version 0StatusaffectedConstraints<1.9.8
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | Simple Membership MailChimp Integration | unaffected |
|
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Sep 2, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
Sep–Oct 2026- EPSS v5
Percentile over time
- EPSS v5
Table of values (2 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.14% (0.00138) | 2.65th | v5 (v2026.06.15) |
| Sep 3, 2026 | 0.10% (0.00095) | 0.72th | v5 (v2026.06.15) |
References (2)
- https://plugins.trac.wordpress.org/browser/simple-membership-mailchimp-integration/trunk/swpm-mailchimp-admin-menu.php#L12 patch
- https://wpscan.com/vulnerability/c7002cf8-83db-4e1f-a6e9-230293290635/ exploitvdb-entrytechnical-description
| Link | Providers | Tags |
|---|---|---|
| https://plugins.trac.wordpress.org/browser/simple-membership-mailchimp-integration/trunk/swpm-mailchimp-admin-menu.php#L12 | patch | |
| https://wpscan.com/vulnerability/c7002cf8-83db-4e1f-a6e9-230293290635/ | exploitvdb-entrytechnical-description |
Change history (0)
No recorded changes yet.