CVE-2021-3646 Cross-site Scripting (XSS) - Reflected in btcpayserver/btcpayserver
Reflected XSS in btcpayserver allows attackers to inject malicious scripts, potentially leading to session hijacking or code execution.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-3646?
CVE-2021-3646 is a medium-severity cross-site scripting vulnerability in btcpayserver/btcpayserver, published on 10 Sep 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
btcpayserver is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Weakness: CWE-79
Which versions are affected by CVE-2021-3646?
It affects 1 product.
Products include Btcpayserver Btcpay Server.
How do I fix CVE-2021-3646?
No fix has been published for CVE-2021-3646 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-2021-3646 being exploited?
There is no known exploitation of CVE-2021-3646 in the wild and no public exploit code.
Other vulnerabilities in btcpayserver/btcpayserver
Sources
Also known as GHSA-p4ww-48c6-98q5.