CVE-2020-27511 Denial of service in n/a
An attacker can cause a Regular Expression Denial of Service in the Prototype JavaScript library by sending crafted HTML tags to the stripTags or unescapeHTML components.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-27511?
CVE-2020-27511 is a high-severity denial of service vulnerability in n/a, published on 21 Jun 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue was discovered in the stripTags and unescapeHTML components in Prototype 1.7.3 where an attacker can cause a Regular Expression Denial of Service (ReDOS) through stripping crafted HTML tags.
Which versions are affected by CVE-2020-27511?
It affects 1 product.
Products include Prototypejs Prototype.
How do I fix CVE-2020-27511?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2020-27511 being exploited?
There is no known exploitation of CVE-2020-27511 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2020-27511, GHSA-6269-grv3-jc94, UBUNTU-CVE-2020-27511.