CVE-2021-28121 Cross-site scripting in n/a
An attacker can inject HTML tags into the robots.txt field, potentially leading to cross-site scripting attacks on the website.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-28121?
CVE-2021-28121 is a critical cross-site scripting vulnerability in n/a, published on 12 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Virtual Robots.txt before 1.10 does not block HTML tags in the robots.txt field.
Which versions are affected by CVE-2021-28121?
It affects 1 product.
Products include Virtual Robots.txt Project Virtual Robots.txt.
How do I fix CVE-2021-28121?
No fix has been published for CVE-2021-28121 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-2021-28121 being exploited?
There is no known exploitation of CVE-2021-28121 in the wild and no public exploit code.
Sources
Also known as GHSA-ppx8-69h9-fch2.