vulnwire
6.1med

CVE-2016-9909

Improper Neutralization of Input During Web Page Generation in html5lib

Also known as GHSA-v9v9-xffq-rwr4, PYSEC-2017-14

Published 9 y ago · modified 4 mo ago · JSON

CVSS
6.1
v3.0 · NVD
CISA KEV
No
not known exploited
EPSS
2.2%
percentile 82%
Public exploits
0
none known

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.

Exploit prediction (EPSS)

2.16% probability of exploitation in the next 30 days, higher than 82% of all scored CVEs.

CVSS scores

Assigned byVersionScoreVector
NVD3.06.1CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD2.04.3AV:N/AC:M/Au:N/C:N/I:P/A:N
GitHub3.06.1CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected packages

EcosystemPackageAffectedFixed in
pypihtml5lib
<0.999999999
0.999999999

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

  • github.com /html5lib/html5lib-python/issues/12 · x_refsource_CONFIRM, x_transferred
  • html5lib.readthedocs.io /en/latest/changes.html#b9 · x_refsource_CONFIRM, x_transferred
  • openwall.com /lists/oss-security/2016/12/06/5 · mailing-list, x_refsource_MLIST, x_transferred
  • openwall.com /lists/oss-security/2016/12/08/8 · mailing-list, x_refsource_MLIST, x_transferred
  • securityfocus.com /bid/95132 · vdb-entry, x_refsource_BID, x_transferred
  • github.com /html5lib/html5lib-python/commit/9b8d8eb5afbc066b7fac9390f5ec75e5e8a7cab7 · x_refsource_CONFIRM, x_transferred
  • github.com /html5lib/html5lib-python/issues/11 · x_refsource_CONFIRM, x_transferred
  • nvd.nist.gov /vuln/detail/CVE-2016-9909 · advisory
  • github.com /advisories/GHSA-v9v9-xffq-rwr4 · advisory
  • github.com /html5lib/html5lib-python · package
  • github.com /pypa/advisory-database/tree/main/vulns/html5lib/PYSEC-2017-14.yaml · web
  • web.archive.org /web/20161229134056/http://www.securityfocus.com/bid/95132 · web

Sources

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.