CVE-2021-36857 MEDIUM

CVE-2021-36857: WordPress Testimonial Builder plugin <= 1.6.1 - Authenticated Stored Cross-Site Scripting (XSS) vulnerability

Vendor Wpshopmart

Product Testimonial (WordPress plugin)

Weakness CWE-79 · XSS

Published August 22, 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 (editor+) Stored Cross-Site Scripting (XSS) vulnerability in wpshopmart Testimonial Builder plugin <= 1.6.1 at WordPress.

Explanation of Vulnerability in Simple Terms

02Summary

The Testimonial WordPress plugin version 1.6.1 and earlier contains a stored cross-site scripting (XSS) vulnerability. An authenticated admin user with high privileges can inject malicious JavaScript into testimonial content. When other users view the affected page, the injected script executes in their browser, potentially compromising their session or stealing sensitive data.

What an attacker can do

03Attacker Capabilities

Inject malicious JavaScript that executes when other users view testimonials.

Potential impact on your site

04Site Impact

A compromised admin account can inject persistent malicious code affecting all site visitors.

Conditions required to exploit

05Prerequisites

Admin-level access to the WordPress site and user interaction (victim must view the affected page).

Key dates

06Disclosure timeline

August 22, 2022 CVE published

April 28, 2026 Record updated

External resources

07References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2021-36857 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-2021-36857

CWE CWE-79

CVSS 4.8 / MEDIUM

Affected versions