CVE-2016-9909

The serializer in html5lib before 0.99999999 might allow remote attackers to conduct cross-site scripting (XSS) attacks by leveraging mishandling of the < (less than) character in attribute values.
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
6.1 MEDIUM
NETWORK
LOW
NONE
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
redhatCNA
---
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 68%
VendorProductVersion
html5libhtml5lib
𝑥
≤ 0.99999999
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
html5lib
bookworm
1.1-3
fixed
bullseye
1.1-3
fixed
jessie
no-dsa
wheezy
no-dsa
sid
1.2-1
fixed
trixie
1.2-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
html5lib
noble
not-affected
mantic
not-affected
lunar
not-affected
kinetic
not-affected
jammy
not-affected
impish
not-affected
hirsute
not-affected
groovy
not-affected
focal
not-affected
eoan
not-affected
disco
not-affected
cosmic
not-affected
bionic
not-affected
artful
not-affected
zesty
not-affected
yakkety
ignored
xenial
needed
trusty
dne
precise
ignored
Common Weakness Enumeration
References
http://www.openwall.com/lists/oss-security/2016/12/06/5
http://www.openwall.com/lists/oss-security/2016/12/08/8
http://www.securityfocus.com/bid/95132
https://github.com/html5lib/html5lib-python/commit/9b8d8eb5afbc066b7fac9390f5ec75e5e8a7cab7
https://github.com/html5lib/html5lib-python/issues/11
https://github.com/html5lib/html5lib-python/issues/12
https://html5lib.readthedocs.io/en/latest/changes.html#b9
http://www.openwall.com/lists/oss-security/2016/12/06/5
http://www.openwall.com/lists/oss-security/2016/12/08/8
http://www.securityfocus.com/bid/95132
https://github.com/html5lib/html5lib-python/commit/9b8d8eb5afbc066b7fac9390f5ec75e5e8a7cab7
https://github.com/html5lib/html5lib-python/issues/11
https://github.com/html5lib/html5lib-python/issues/12
https://html5lib.readthedocs.io/en/latest/changes.html#b9