CVE-2021-30151 Cross-site Scripting in Sidekiq
An attacker can execute arbitrary scripts in the context of other users via the queue name in the live-poll feature.
- 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-2021-30151?
CVE-2021-30151 is a medium-severity cross-site scripting vulnerability in Debian Debian Linux, published on 6 Apr 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
Sidekiq through 5.1.3 and 6.x through 6.2.0 allows XSS via the queue name of the live-poll feature when Internet Explorer is used.
Weakness: CWE-79
Which versions are affected by CVE-2021-30151?
4 open source packages ship an affected version, including sidekiq. It affects 2 products.
| Package | Affected | Fixed in |
|---|---|---|
sidekiq RubyGems | All versions | 5.2.0 |
sidekiq RubyGems | All versions | 5.2.0 |
sidekiq RubyGems | From 6.0.0 | 6.2.1 |
sidekiq RubyGems | From 6.0.0 | 6.2.1 |
Products include Contribsys Sidekiq, Debian Debian Linux.
How do I fix CVE-2021-30151?
Upgrade sidekiq to a fixed version for your release line: 5.2.0 or 6.2.1.
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-2021-30151 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-30151 exists.
Public exploit code: 1 Nuclei template.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2021-30151, GHSA-grh7-935j-hg6w, UBUNTU-CVE-2021-30151.