MC4WP: Mailchimp for WordPress <= 4.8.6 - Authenticated (Admin+) Stored Cross-Site Scripting

2022-03-02 07:15

Asif Nawaz Minhas

Strategic Overview

Status

Patched in 4.8.7

Affected PluginMC4WP: Mailchimp for WordPress

Affected Version<= 4.8.6

CVSS5.5Medium

CVECVE-2021-36833

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 several parameters in versions up to, and including, 4.8.6 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers with administrative 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 4.8.7, or a newer patched version --- IDENTIFIER: CWE-79 (Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

External References

https://www.cve.org/CVERecord?id=CVE-2021-36833 https://www.wordfence.com/threat-intel/vulnerabilities/id/9c3dc5fe-b1c8-4581-8100-68d313c3ac20

CVSS Vector

5.5

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

Base

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

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