CVE-2021-42663 Cross-site scripting in n/a
Attackers can inject HTML into the event booking system to alter website visibility and display malicious content to users.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-42663?
CVE-2021-42663 is a medium-severity cross-site scripting vulnerability in n/a, published on 5 Nov 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
An HTML injection vulnerability exists in Sourcecodester Online Event Booking and Reservation System in PHP/MySQL via the msg parameter to /event-management/index.php. An attacker can leverage this vulnerability in order to change the visibility of the website. Once the target user clicks on a given link he will display the content of the HTML code of the attacker's choice.
Weakness: CWE-79
Which versions are affected by CVE-2021-42663?
It affects 1 product.
Products include Online Event Booking and Reservation System Project Online Event Booking and Reservation System.
How do I fix CVE-2021-42663?
No fix has been published for CVE-2021-42663 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-2021-42663 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-42663 exists.
Public exploit code: 1 Nuclei template and 1 proofs of concept on GitHub.
Other vulnerabilities in n/a
Sources
Also known as GHSA-948r-pr54-gh74.