Medium severity · published Mar 24, 2020
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
6.1
CVSS
1.3%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)1.3% · higher than 71% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BL
Bleach · Mozilla
before 3.1.2 · source: NVD
FE
Fedora · Fedoraproject
33 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-6816
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-6816
Exploit
https://advisory.checkmarx.net/advisory/CX-2020-4277
Third Party Advisory
https://github.com/mozilla/bleach/security/advisories/GHSA-m6xf-fq7q-8743
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EDQU2SZLZMSSACCBUBJ6NOSRNNBDYFW5/
Exploit
https://www.checkmarx.com/blog/vulnerabilities-discovered-in-mozilla-bleach
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