CVE-2021-36910 LOW

CVE-2021-36910: WordPress WP-Appbox plugin <= 4.3.20 - Authenticated Stored Cross-Site Scripting (XSS) vulnerability

Vendor Marcel Schmilgeit

Product WP-Appbox (WordPress plugin)

Weakness CWE-79 · XSS

Published April 11, 2022

Last update April 28, 2026

View on NVD All CVEs

CVSS base score

3.4/10

Attack vector Network

Attack complexity Low

Privileges required High

User interaction Required

Confidentiality None

Integrity Low

CVSS vector

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

What the vulnerability does

01Description

Authenticated (admin user role) Stored Cross-Site Scripting (XSS) in WP-Appbox (WordPress plugin) <= 4.3.20.

Explanation of Vulnerability in Simple Terms

02Summary

WP-Appbox versions up to 4.3.20 contain a stored cross-site scripting (XSS) vulnerability. An authenticated admin can inject malicious scripts that execute in other users' browsers when they view affected pages. The vulnerability requires admin privileges and user interaction to exploit, and impacts site integrity rather than confidentiality or availability.

What an attacker can do

03Attacker Capabilities

Inject malicious scripts that run in other users' browsers when they visit the site.

Potential impact on your site

04Site Impact

A compromised admin account can deface pages or steal data from other users' sessions.

Conditions required to exploit

05Prerequisites

Admin-level access to the WordPress site; victim must view a page containing the injected script.

Key dates

06Disclosure timeline

April 11, 2022 CVE published

April 28, 2026 Record updated

External resources

07References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2021-36910 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-2021-36910

CWE CWE-79

CVSS 3.4 / LOW

Affected versions