What is CVE-2023-23900?

CVE-2023-23900 is a medium-severity vulnerability in Yikes, Inc. Easy Forms For Mailchimp, classified under Cross-site Scripting. CVSS score: 5.8/10. Published 2023-08-10.

How severe is CVE-2023-23900?

Medium severity. CVSS v3 base score is 5.8 out of 10.

Is CVE-2023-23900 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Yikes, Inc. Easy Forms For Mailchimp

CVE-2023-23900

Unauth. Reflected Cross-Site Scripting (XSS) vulnerability in YIKES, Inc. Easy Forms for Mailchimp plugin <= 6.8.8 versions.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2023-08-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.004 (27.9th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 27.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

patchstack.com/database/vulnerability/yikes-inc-easy-mailchimp-extender/wordpre… (Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2023-23900?: CVE-2023-23900 is a medium-severity vulnerability in Yikes, Inc. Easy Forms For Mailchimp, classified under Cross-site Scripting. CVSS score: 5.8/10. Published 2023-08-10.
How severe is CVE-2023-23900?: Medium severity. CVSS v3 base score is 5.8 out of 10.
Is CVE-2023-23900 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.