CVE-2023-1323: Easy Forms for MailChimp < 6.8.9 - Admin+ Stored XSS

Severity: medium (CVSS 4.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-06-12 · updated 2026-06-17

Description

The Easy Forms for Mailchimp WordPress plugin before 6.8.9 does not sanitise and escape some of its from parameters, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup)

Affected products

Easy Forms for Mailchimp: before 6.8.9 — fixed in 6.8.9

How to fix

Upgrade to a fixed version: Easy Forms for Mailchimp 6.8.9. Check the vendor advisory for mitigations.

References

https://wpscan.com/vulnerability/d3a2af00-719c-4b86-8877-b1d68a589192
https://wpscan.com/vulnerability/d3a2af00-719c-4b86-8877-b1d68a589192

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