VulnerabilityModified
CVE-2020-6816
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.
MEDIUM 6.1EPSS 1.33%
Does this matter?
Lower severity and a low EPSS score (1.33%). Track it; it rarely justifies an emergency change on its own.
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 3.1
- 6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 1.33% probability · 69th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- mozilla/bleach · fedoraproject/fedora
- Source
- security@mozilla.org
References
- https://advisory.checkmarx.net/advisory/CX-2020-4277Exploit, Third Party Advisory
- https://github.com/mozilla/bleach/security/advisories/GHSA-m6xf-fq7q-8743Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EDQU2SZLZMSSACCBUBJ6NOSRNNBDYFW5/
- https://www.checkmarx.com/blog/vulnerabilities-discovered-in-mozilla-bleachExploit, Third Party Advisory
- https://advisory.checkmarx.net/advisory/CX-2020-4277Exploit, Third Party Advisory
- https://github.com/mozilla/bleach/security/advisories/GHSA-m6xf-fq7q-8743Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EDQU2SZLZMSSACCBUBJ6NOSRNNBDYFW5/
- https://www.checkmarx.com/blog/vulnerabilities-discovered-in-mozilla-bleachExploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.