Medium severity · published Feb 22, 2017
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…
6.1
CVSS
2.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.0/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)2.2% · higher than 82% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HT
Html5lib · Html5lib
through 0.99999999 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2016-9909
CVE.org
https://www.cve.org/CVERecord?id=CVE-2016-9909
Mailing List
http://www.openwall.com/lists/oss-security/2016/12/06/5
Mailing List
http://www.openwall.com/lists/oss-security/2016/12/08/8
Third Party Advisory
http://www.securityfocus.com/bid/95132
Patch
https://github.com/html5lib/html5lib-python/commit/9b8d8eb5afbc066b7fac9390f5ec75e5e8a7cab7
Vendor Advisory
https://github.com/html5lib/html5lib-python/issues/11
Vendor Advisory
https://github.com/html5lib/html5lib-python/issues/12
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