MailChimp for Wordpress <= 4.9.16 - Authenticated (Administrator+) Stored Cross-Site Scripting

2024-09-20 20:24

Jorge Diaz (ddiax)

Strategic Overview

Status

Patched in 4.9.17

Affected PluginMC4WP: Mailchimp for WordPress

Affected Version<= 4.9.16

CVSS4.4Medium

CVECVE-2024-8680

View all MC4WP: Mailchimp for WordPress vulnerabilities

Vulnerability Overview

The MC4WP: Mailchimp for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 4.9.16 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

Technical Analysis

REMEDIATION: Update to version 4.9.17, or a newer patched version --- IDENTIFIER: CWE-80 (Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)) The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as <, >, and & that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages.

External References

https://www.cve.org/CVERecord?id=CVE-2024-8680 https://www.wordfence.com/threat-intel/vulnerabilities/id/aa464547-0380-4b91-a5ea-0cd9a66da7a7

CVSS Vector

4.4

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

Base

Attack VectorNetwork
Attack ComplexityHigh
Privileges RequiredHigh
User InteractionNone
ScopeChanged
ConfidentialityLow
IntegrityLow
AvailabilityNone

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