CVE-2021-42648 Cross site scripting in code-server
Attackers can execute arbitrary code via crafted URLs in Code-Server, requiring an upgrade to secure the web application.
- 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
- Available
What is CVE-2021-42648?
CVE-2021-42648 is a medium-severity cross-site scripting vulnerability in n/a, published on 11 May 2022. 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
Cross-site scripting (XSS) vulnerability exists in Coder Code-Server before 3.12.0, allows attackers to execute arbitrary code via crafted URL.
Weakness: CWE-79
Which versions are affected by CVE-2021-42648?
2 open source packages ship an affected version, including code-server. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
code-server npm | All versions | 3.12.0 |
code-server npm | All versions | 3.12.0 |
Products include Coder Code-Server.
How do I fix CVE-2021-42648?
Upgrade code-server to 3.12.0 or later.
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-2021-42648 being exploited?
There is no known exploitation of CVE-2021-42648 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-2gp3-6c9p-jp7w.