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CVE-2026-40787 ExpressTech CVE debrief

CVE-2026-40787 is a Unauthenticated Cross Site Scripting (XSS) vulnerability affecting Quiz And Survey versions up to 11.0.0. The vulnerability has a CVSS score of 7.1 and is considered HIGH severity. It was published on [2026-06-15T21:16:50.943Z](https://www.cve.org/CVERecord?id=CVE-2026-40787) and last modified on [2026-06-15T21:24:32.790Z](https://www.cve.org/CVERecord?id=CVE-2026-40787).

Vendor
ExpressTech
Product
Quiz And Survey Master
CVSS
HIGH 7.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-15
Original CVE updated
2026-06-15
Advisory published
2026-06-15
Advisory updated
2026-06-15

Who should care

Users of Quiz And Survey Master plugin versions up to 11.0.0 should apply patches or mitigations to prevent exploitation of this vulnerability.

Technical summary

The vulnerability is caused by a lack of proper input validation and sanitization in the Quiz And Survey Master plugin. This allows an unauthenticated attacker to inject malicious JavaScript code, potentially leading to unauthorized actions or data theft.

Defensive priority

HIGH

Recommended defensive actions

  • Apply patches or updates to Quiz And Survey Master plugin versions up to 11.0.0.
  • Implement additional security measures such as input validation and Content Security Policy (CSP) headers.

Evidence notes

The CVE was published by the CVE Numbering Authority and details were provided by Patchstack.

Official resources

CVE-2026-40787 was disclosed by Patchstack on 2026-06-15.