CVE-2017-20257 Joomla! Component Quiz Deluxe 3.7.4 SQL Injection
Unauthenticated attackers can execute arbitrary SQL commands via the ajaxaction.flag_question task to extract sensitive database information.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2017-20257?
CVE-2017-20257 is a high-severity SQL injection vulnerability in Joomplace Quiz Deluxe, published on 19 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-89
Which versions are affected by CVE-2017-20257?
It affects 1 product.
Products include Joomplace Quiz Deluxe.
How do I fix CVE-2017-20257?
No fix has been published for CVE-2017-20257 yet. Limit exposure of the affected software until one is available.
Use parameterised queries everywhere and never build SQL by joining strings. Upgrade affected software first; a web application firewall only buys time. More about SQL injection.
Is CVE-2017-20257 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2017-20257 exists.
Sources
Also known as GHSA-f3w3-4pxg-f2qc.