CVE-2021-36839 MEDIUM

CVE-2021-36839: WordPress Social Media Follow Buttons Bar plugin <= 4.73 - Authenticated Stored Cross-Site Scripting (XSS) vulnerability

Vendor Space X-Chimp
Product Social Media Follow Buttons Bar (WordPress plugin)
Weakness CWE-79 · XSS
Published September 30, 2022
Last update April 28, 2026
View on NVD All CVEs

CVSS base score

4.8/10
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:N

What the vulnerability does

01Description

Authenticated (admin+) Stored Cross-Site Scripting (XSS) vulnerability in Social Media Follow Buttons Bar plugin <= 4.73 at WordPress.

Explanation of Vulnerability in Simple Terms

02Summary

The Social Media Follow Buttons Bar plugin for WordPress versions up to 4.73 contains a stored cross-site scripting (XSS) vulnerability. An authenticated admin can inject malicious JavaScript through plugin settings that executes in the browsers of site visitors. The vulnerability requires admin privileges and user interaction to exploit, but can affect all site visitors once injected.

What an attacker can do

03Attacker Capabilities

Inject malicious JavaScript that runs in visitors' browsers when they view the site.

Potential impact on your site

04Site Impact

A compromised admin account can inject malware or steal visitor data without your knowledge.

Conditions required to exploit

05Prerequisites

Admin-level access to WordPress and a site visitor must view a page with the vulnerable plugin active.

Key dates

06Disclosure timeline

September 30, 2022 CVE published
April 28, 2026 Record updated

Related vulnerabilities

08Related CVE

CVE-2026-13425 Database for CF7 <= 1.2.6 - Unauthenticated Stored Cross-Site Scripting via Array Form Field Values CVE-2026-65438 WordPress Message Filter for Contact Form 7 plugin <= 1.6.3.9 - Cross Site Scripting (XSS) vulnerability CVE-2026-65763 Joomla Extension - phoca.cz - Reflected XSS vulnerability in Phoca Maps 5.0.0-6.0.4 CVE-2026-12231 Exclusive Addons for Elementor <= 2.7.9.8 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'exad_infobox_image' CVE-2026-65533 WordPress Smart SEO Tool plugin <= 4.1.2 - Cross Site Scripting (XSS) vulnerability