Vulnerability 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.
CVSS Score
6.1
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Bleach | < 3.1.2 |
| Fedoraproject | Fedora | 33 |
Related Weaknesses (CWE)
References
- https://advisory.checkmarx.net/advisory/CX-2020-4277ExploitThird Party Advisory
- https://github.com/mozilla/bleach/security/advisories/GHSA-m6xf-fq7q-8743Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://www.checkmarx.com/blog/vulnerabilities-discovered-in-mozilla-bleachExploitThird Party Advisory
- https://advisory.checkmarx.net/advisory/CX-2020-4277ExploitThird Party Advisory
- https://github.com/mozilla/bleach/security/advisories/GHSA-m6xf-fq7q-8743Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://www.checkmarx.com/blog/vulnerabilities-discovered-in-mozilla-bleachExploitThird Party Advisory
FAQ
What is CVE-2020-6816?
CVE-2020-6816 is a vulnerability with a CVSS score of 6.1 (MEDIUM). 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.
How severe is CVE-2020-6816?
CVE-2020-6816 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-6816?
Check the references section above for vendor advisories and patch information. Affected products include: Mozilla Bleach, Fedoraproject Fedora.