XSS in Html5lib
CVE-2016-9910
The serializer in html5lib before 0.99999999 might allow remote attackers to conduct cross-site scripting (XSS) attacks by leveraging mishandling of special characters in attribute values, a different vulnerability than CVE-2016-9909.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.022 (81.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 81st percentile — 81.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.022 · newest: 0.022 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/html5lib/html5lib-python/issues/12 (Vendor Advisory)
- html5lib.readthedocs.io/en/latest/changes.html (Release Notes)
- www.openwall.com/lists/oss-security/2016/12/06/5 (mailing-list, Patch, Mailing List, Third Party Advisory)
- www.openwall.com/lists/oss-security/2016/12/08/8 (mailing-list, Patch, Mailing List, Third Party Advisory)
- www.securityfocus.com/bid/95132 (VDB Entry, Third Party Advisory, vdb-entry)
- github.com/html5lib/html5lib-python/commit/9b8d8eb5afbc066b7fac9390f5ec75e5e8a7… (Patch)
- github.com/html5lib/html5lib-python/issues/11 (Vendor Advisory)
Frequently asked questions
- What is CVE-2016-9910?
- CVE-2016-9910 is a medium-severity vulnerability in Html5lib, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2017-02-22.
- How severe is CVE-2016-9910?
- Medium severity. CVSS v3 base score is 6.1 out of 10.
- Is CVE-2016-9910 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.