CVE-2021-31274 Cross-site Scripting in LibreNMS
Attackers can execute arbitrary JavaScript via stored XSS in the API Access page due to insufficient input sanitization.
- 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
- Available
What is CVE-2021-31274?
CVE-2021-31274 is a medium-severity cross-site scripting vulnerability in Librenms Librenms, published on 8 Sep 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
In LibreNMS < 21.3.0, a stored XSS vulnerability was identified in the API Access page due to insufficient sanitization of the $api->description variable. As a result, arbitrary Javascript code can get executed.
Weakness: CWE-79
Which versions are affected by CVE-2021-31274?
2 open source packages ship an affected version, including librenms/librenms. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
librenms/librenms Packagist | All versions | 21.3.0 |
librenms/librenms Packagist | All versions | 21.3.0 |
Products include Librenms Librenms.
How do I fix CVE-2021-31274?
Upgrade librenms/librenms to 21.3.0 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-2021-31274 being exploited?
There is no known exploitation of CVE-2021-31274 in the wild and no public exploit code.
Other vulnerabilities in Librenms Librenms
Sources
Also known as GHSA-2r2w-jrh2-p4gr.