CVE-2026-4973 SourceCodester Online Quiz System add-question.php cross site scripting
Remote attackers can inject malicious scripts via the quiz_question parameter in add-question.php, potentially compromising user sessions.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-4973?
CVE-2026-4973 is a medium-severity cross-site scripting vulnerability in SourceCodester Online Quiz System, published on 27 Mar 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
A vulnerability was detected in SourceCodester Online Quiz System up to 1.0. Affected by this vulnerability is an unknown functionality of the file endpoint/add-question.php. Performing a manipulation of the argument quiz_question results in cross site scripting. It is possible to initiate the attack remotely. The exploit is now public and may be used.
Which versions are affected by CVE-2026-4973?
How do I fix CVE-2026-4973?
No fix has been published for CVE-2026-4973 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-4973 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4973 exists.
Sources
Also known as GHSA-6xj8-m384-46vj.