CVE-2023-4840 MEDIUM

CVE-2023-4840: MapPress Maps for WordPress <= 2.88.4 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode

Vendor Chrisvrichardson
Product MapPress Maps for WordPress
Weakness CWE-79 · XSS
Published September 12, 2023
Last update April 8, 2026

CVSS base score

6.4/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality Low
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

The MapPress Maps for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'mappress' shortcode in versions up to, and including, 2.88.4 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers with contributor-level and above permissions to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Explanation of Vulnerability in Simple Terms

02Summary

MapPress Maps for WordPress versions up to 2.88.4 contain a stored cross-site scripting (XSS) vulnerability. An authenticated user with low privileges can inject malicious scripts into map data that execute in the browsers of other site visitors. The vulnerability affects the scope beyond the plugin itself, potentially compromising site security and user data.

What an attacker can do

03Attacker Capabilities

Inject malicious JavaScript that runs in other users' browsers when they view affected maps.

Potential impact on your site

04Site Impact

Visitors viewing maps created by compromised accounts may have sessions hijacked, credentials stolen, or malware injected.

Conditions required to exploit

05Prerequisites

Attacker must have a low-privilege WordPress account (e.g., contributor or subscriber role).

Key dates

06Disclosure timeline

September 12, 2023 CVE published
April 8, 2026 Record updated

Related vulnerabilities

08Related CVE