---
id: CVE-2017-20257
title: Joomla! Component Quiz Deluxe 3.7.4 SQL Injection
summary: >-
  Joomla! Component Quiz Deluxe 3.7.4 contains an SQL injection vulnerability
  that allows unauthenticated attackers to execute arbitrary SQL commands
  through the ajaxaction.flag_question task. Attackers can inject malicious SQL
  code via th…
severity: high
cvss: 8.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-89
vendor: Joomplace
product: Quiz Deluxe
affected:
  - quiz_deluxe 3.7.4
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-06-22T16:43:27.023111Z'
exploitAvailable: true
published: '2026-06-19'
updated: '2026-10-01'
sourceUpdated: '2026-10-01T15:19:04.014Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2017-20257'
references:
  - url: 'https://www.exploit-db.com/exploits/42589'
    label: ExploitDB-42589
  - url: 'http://joomplace.com/'
    label: Official Product Homepage
  - url: >-
      https://extensions.joomla.org/extensions/extension/living/education-a-culture/quiz-deluxe/
    label: Product Reference
  - url: >-
      https://www.vulncheck.com/advisories/joomla-component-quiz-deluxe-sql-injection
    label: 'VulnCheck Advisory: Joomla! Component Quiz Deluxe 3.7.4 SQL Injection'
tags:
  - cve.org
  - exploit-available
epss: 0.00492
epssPercentile: 0.40014
ingestedAt: '2026-10-01T15:48:17.891Z'
---

## Overview

Joomla! Component Quiz Deluxe 3.7.4 contains an SQL injection vulnerability that allows unauthenticated attackers to execute arbitrary SQL commands through the ajaxaction.flag_question task. Attackers can inject malicious SQL code via the stu_quiz_id or flag_quest parameters to manipulate database queries and extract sensitive information.

## Affected

- `quiz_deluxe 3.7.4`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.