CVE-2026-40787 HIGH

CVE-2026-40787: WordPress Quiz And Survey Master plugin <= 11.0.0 - Cross Site Scripting (XSS) vulnerability

Vendor Expresstech

Product Quiz And Survey Master

Weakness CWE-79 · XSS

Published June 15, 2026

Last update June 16, 2026

View on NVD All CVEs

CVSS base score

7.1/10

Attack vector Network

Attack complexity Low

Privileges required None

User interaction Required

Confidentiality Low

Integrity Low

CVSS vector

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

What the vulnerability does

01Description

Unauthenticated Cross Site Scripting (XSS) in Quiz And Survey Master <= 11.0.0 versions.

Explanation of Vulnerability in Simple Terms

02Summary

Quiz And Survey Master contains a cross-site scripting (XSS) vulnerability that allows attackers to inject malicious scripts into survey or quiz content. When a site visitor views an affected page, the attacker's code runs in their browser, potentially stealing session data or redirecting them to malicious sites. The vulnerability affects versions up to 11.0.0 and requires the victim to visit a crafted link or page.

What an attacker can do

03Attacker Capabilities

Inject malicious JavaScript that runs in visitors' browsers when they view surveys or quizzes.

Potential impact on your site

04Site Impact

Visitor sessions, credentials, or personal data entered in surveys could be compromised; site reputation damaged.

Conditions required to exploit

05Prerequisites

Victim must visit a page containing the attacker's malicious survey or quiz link.

Key dates

06Disclosure timeline

June 15, 2026 CVE published

June 16, 2026 Record updated

External resources

07References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2026-40787 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-2026-40787

CWE CWE-79

CVSS 7.1 / HIGH

Affected versions