CVE-2024-34078

html-sanitizer is an allowlist-based HTML cleaner. If using `keep_typographic_whitespace=False` (which is the default), the sanitizer normalizes unicode to the NFKC form at the end. Some unicode characters normalize to chevrons; this allows specially crafted HTML to escape sanitization. The problem has been fixed in 2.4.2.
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
6.1 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
GitHub_MCNA
6.1 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CISA-ADPADP
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CVEADP
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Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 12%
Debian logo
Debian Releases
Debian Product
Codename
python-html-sanitizer
bullseye
vulnerable
bullseye (security)
1.9.1-2+deb11u1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
python-html-sanitizer
plucky
dne
oracular
needed
noble
needed
mantic
dne
jammy
needed
focal
dne
Common Weakness Enumeration
References
https://github.com/matthiask/html-sanitizer/commit/48db42fc5143d0140c32d929c46b802f96913550
https://github.com/matthiask/html-sanitizer/security/advisories/GHSA-wvhx-q427-fgh3
https://github.com/matthiask/html-sanitizer/commit/48db42fc5143d0140c32d929c46b802f96913550
https://github.com/matthiask/html-sanitizer/security/advisories/GHSA-wvhx-q427-fgh3
https://lists.debian.org/debian-lts-announce/2024/08/msg00000.html