CVE-2020-6816

Public Exploit

Description

In Mozilla Bleach before 3.12, a mutation XSS in bleach.clean when RCDATA and either svg or math tags are whitelisted and the keyword argument strip=False.

Category

6.1
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.42%
Vendor Advisory fedoraproject.org
Affected: n/a Mozilla Bleach
Published at:
Updated at:

References

Link Tags
https://github.com/mozilla/bleach/security/advisories/GHSA-m6xf-fq7q-8743 third party advisory
https://www.checkmarx.com/blog/vulnerabilities-discovered-in-mozilla-bleach third party advisory exploit
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EDQU2SZLZMSSACCBUBJ6NOSRNNBDYFW5/ vendor advisory
https://advisory.checkmarx.net/advisory/CX-2020-4277 third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2020-6816?
CVE-2020-6816 has been scored as a medium severity vulnerability.
How to fix CVE-2020-6816?
To fix CVE-2020-6816, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-6816 being actively exploited in the wild?
It is possible that CVE-2020-6816 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-6816?
CVE-2020-6816 affects n/a Mozilla Bleach.
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