CVE-2026-11780Network attack vector

Contributor stored XSS via unsanitized question_title

Published Aug 16, 2026 · Updated Aug 16, 2026

Stored XSS in ExpressTech Systems Quiz and Survey Master 11.2.1 and earlier allows remote authenticated users to run script via question_title. The question-create REST handler stored question_title without sanitization, and the Question Bank rendered the stored value as raw HTML in an Underscore template. Contributor-level access is required, and execution occurs when an administrator opens the Question Bank, allowing same-origin script to act in that session.

CVSS severity6.4
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in ExpressTech Systems Quiz and Survey Master 11.2.1 and earlier allows remote authenticated users to run script via question_title. The question-create REST handler stored question_title without sanitization, and the Question Bank rendered the stored value as raw HTML in an Underscore template. Contributor-level access is required, and execution occurs when an administrator opens the Question Bank, allowing same-origin script to act in that session.

The record

CVE
CVE-2026-11780
Published
Aug 16, 2026
Updated
Aug 16, 2026
Vendor
ExpressTech Systems
Product
Quiz and Survey Master
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 16, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=11.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ExpressTech Systems · Quiz and Survey Masterversion=0 <=11.2.1

Published CVSS scores

6.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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