CVE-2023-33328 MEDIUM

CVE-2023-33328: WordPress MailChimp Subscribe Forms Plugin <= 4.0.9.1 is vulnerable to Cross Site Scripting (XSS)

Vendor Pluginops

Product MailChimp Subscribe Form

Weakness CWE-79 · XSS

Published May 28, 2023

Last update April 28, 2026

View on NVD All CVEs

CVSS base score

5.9/10

Attack vector Network

Attack complexity Low

Privileges required High

User interaction Required

Confidentiality Low

Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L

What the vulnerability does

01Description

Auth. (admin+) Stored Cross-Site Scripting (XSS) vulnerability in PluginOps MailChimp Subscribe Form plugin <= 4.0.9.1 versions.

Explanation of Vulnerability in Simple Terms

02Summary

MailChimp Subscribe Form versions up to 4.0.9.1 contain a stored cross-site scripting (XSS) vulnerability. An authenticated admin can inject malicious scripts into form fields that execute when other users view the form. The vulnerability requires admin privileges and user interaction to exploit, but can affect site visitors and other administrators.

What an attacker can do

03Attacker Capabilities

Inject malicious scripts that run in the browsers of site visitors and other admins viewing the form.

Potential impact on your site

04Site Impact

A compromised admin account can inject scripts to steal visitor data, redirect users, or deface your site.

Conditions required to exploit

05Prerequisites

Admin-level access to the site and the victim must view the affected form.

Key dates

06Disclosure timeline

May 28, 2023 CVE published

April 28, 2026 Record updated

External resources

07References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2023-33328 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/79.html AskarLabs — CWE-79 write-up Cross-Site Scripting

Related vulnerabilities

Identifiers

CVE CVE-2023-33328

CWE CWE-79

CVSS 5.9 / MEDIUM

Affected versions