CVE-2020-6816

NameCVE-2020-6816
DescriptionIn 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDSA-4643-1
NVD severitymedium
Debian Bugs954236

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
python-bleach (PTS)jessie1.4-1vulnerable
jessie (security)1.4-1+deb8u1vulnerable
stretch2.0-1vulnerable
buster3.1.0-1vulnerable
buster (security)3.1.2-0+deb10u1fixed
bullseye, sid3.1.4-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
python-bleachsource(unstable)3.1.3-1954236
python-bleachsourcebuster3.1.2-0+deb10u1DSA-4643-1

Notes

[stretch] - python-bleach <ignored> (Requires invasive changes to address issue)
[jessie] - python-bleach <ignored> (Requires invasive change to address issue)
https://bugzilla.mozilla.org/show_bug.cgi?id=1621692 (not public)
https://github.com/mozilla/bleach/security/advisories/GHSA-m6xf-fq7q-8743
https://github.com/mozilla/bleach/commit/175f67740e7951e1d80cefb7831e6c3e4efeb986

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