Is CVE-2016-9895 in the CISA KEV catalog?

No. CVE-2016-9895 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2016-9895?

CVE-2016-9895 has a CVSS v3 base score of 6.1 (MEDIUM).

What is the EPSS score for CVE-2016-9895?

CVE-2016-9895 has an EPSS score of 1.84% (76th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2016-9895?

Upgrade firefox on debian unstable to 50.1.0-1 or later. Fixes are available for 6 affected products.

CVE & CISA-KEV Catalog

CVE-2016-9895

MEDIUMEPSS 76th pctl

6.1

CVSS v3

NVD

Description

Event handlers on "marquee" elements were executed despite a strict Content Security Policy (CSP) that disallowed inline JavaScript. This vulnerability affects Firefox < 50.1, Firefox ESR < 45.6, and Thunderbird < 45.6.

CWE-254

How to fix

Remediation Available

firefoxDebian

Fixed in:50.1.0-1CVE-2016-9895

firefoxUbuntu

Fixed in:50.1.0+build2-0ubuntu0.14.04.1USN-3155-1

Fixed in:50.1.0+build2-0ubuntu0.16.04.1USN-3155-1

thunderbirdUbuntu

Fixed in:1:45.7.0+build1-0ubuntu0.14.04.1USN-3165-1

Fixed in:1:45.7.0+build1-0ubuntu0.16.04.1USN-3165-1

DeveloperEditionWindows application

Affected:45.6.0Fixed in:45.6.0Mozilla

Affected:50.1Fixed in:50.1Mozilla

Mozilla Firefox (en-US)Windows application

Affected:45.6.0Fixed in:45.6.0Mozilla

Affected:50.1Fixed in:50.1Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:45.6.0Fixed in:45.6.0Mozilla

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeChanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

1.84%probability of exploitation in 30 days

76thpercentile

Elevated risk: more likely to be exploited than 76% of all known CVEs.

References

Patch1

bugzilla.mozilla.org

Vendor Advisory3

Third-Party Advisory6

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-25.