CVE-2021-24136: Testimonials Widget < 4.0.0 - Multiple Authenticated Stored XSS

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-03-18 · updated 2026-06-17
Weakness: CWE-79

Description

Unvalidated input and lack of output encoding in the Testimonials Widget WordPress plugin, versions before 4.0.0, lead to multiple Cross-Site Scripting vulnerabilities, allowing remote attackers to inject arbitrary JavaScript code or HTML via the below parameters: - Author - Job Title - Location - Company - Email - URL

Affected products

Testimonials Widget: before 4.0.0 — fixed in 4.0.0

How to fix

Upgrade to a fixed version: Testimonials Widget 4.0.0. Check the vendor advisory for mitigations.

References

https://wpscan.com/vulnerability/537ee410-3833-4e88-9d4a-ee3c72b44ca1
https://wpscan.com/vulnerability/537ee410-3833-4e88-9d4a-ee3c72b44ca1

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