CVE-2021-36863 MEDIUM

CVE-2021-36863: WordPress Quiz And Survey Master plugin <= 7.3.4 - Auth. Stored Cross-Site Scripting (XSS) vulnerability

Vendor Expresstech
Product Quiz And Survey Master (WordPress plugin)
Weakness CWE-79 · XSS
Published October 28, 2022
Last update April 28, 2026
View on NVD All CVEs

CVSS base score

5.4/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction Required
Confidentiality Low
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

Auth. (contributor+) Stored Cross-Site Scripting (XSS) vulnerability in ExpressTech Quiz And Survey Master plugin <= 7.3.4 on WordPress.

Explanation of Vulnerability in Simple Terms

02Summary

Quiz And Survey Master versions up to 7.3.4 contain a stored cross-site scripting (XSS) vulnerability. An authenticated user with low privileges can inject malicious scripts into quiz or survey content. When other users view the affected content, the scripts execute in their browsers, potentially stealing session data or performing actions on their behalf. The vulnerability requires user interaction to trigger.

What an attacker can do

03Attacker Capabilities

Inject malicious scripts that execute when other users view quizzes or surveys, stealing their session data or performing actions as them.

Potential impact on your site

04Site Impact

Users' session cookies or credentials could be stolen; attackers could perform unauthorized actions as legitimate users viewing quizzes.

Conditions required to exploit

05Prerequisites

Attacker must have a low-privilege WordPress account (e.g., contributor or subscriber role) and a victim must view the affected quiz or survey.

Key dates

06Disclosure timeline

October 28, 2022 CVE published
April 28, 2026 Record updated

Related vulnerabilities

08Related CVE

CVE-2026-7623 SureForms <= 2.8.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'headingWrapper' Block Attribute CVE-2026-65550 WordPress Tabs plugin <= 2.5 - Cross Site Scripting (XSS) vulnerability CVE-2026-13440 StoreGrowth: Smart Sales Booster for WooCommerce | BOGO, Upsells, Direct Checkout, Quick View, Side Cart <= 2.1.0 - Unauthenticated Stored Cross-Site Scripting via 'message_popup' Parameter CVE-2026-7436 WPC Badge Management for WooCommerce <= 3.1.6 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'text' Attribute CVE-2026-65440 WordPress GetGenie plugin <= 4.4.3 - Cross Site Scripting (XSS) vulnerability