CVE-2016-9909

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

2.16% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 81.9% of scored records. A rank, not a probability.

NVD base score

6.1 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2017-02-22 16:00Z9 YR AGO

Last updated

2024-08-06 03:07Z2 YR AGO

Reserved

2016-12-08

Assigning CNA

redhat

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Base

Data version

5.1

Document digest

7a27fbc4c5874e778b5956b89efdb80bfc042053af28563de9241942505778f5

• github.comhttps://github.com/html5lib/html5lib-python/issues/12x_refsource_CONFIRM
• html5lib.readthedocs.iohttps://html5lib.readthedocs.io/en/latest/changes.html#b9x_refsource_CONFIRM
• www.openwall.com[oss-security] 20161206 CVE Request: html5lib: potential cross-site scripting vulnerablity: quote attributes that need escaping in legacy browsershttp://www.openwall.com/lists/oss-security/2016/12/06/5mailing-listx_refsource_MLIST
• www.openwall.com[oss-security] 20161208 Re: CVE Request: html5lib: potential cross-site scripting vulnerablity: quote attributes that need escaping in legacy browsershttp://www.openwall.com/lists/oss-security/2016/12/08/8mailing-listx_refsource_MLIST
• www.securityfocus.com95132http://www.securityfocus.com/bid/95132vdb-entryx_refsource_BID
• github.comhttps://github.com/html5lib/html5lib-python/commit/9b8d8eb5afbc066b7fac9390f5ec75e5e8a7cab7x_refsource_CONFIRM
• github.comhttps://github.com/html5lib/html5lib-python/issues/11x_refsource_CONFIRM