Is CVE-2016-1954 in the CISA KEV catalog?

No. CVE-2016-1954 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2016-1954?

CVE-2016-1954 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2016-1954?

CVE-2016-1954 has an EPSS score of 2.34% (82th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2016-1954?

Upgrade firefox on debian unstable to 45.0-1 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2016-1954

HIGHEPSS 82th pctl

8.8

CVSS v3

NVD

Description

The nsCSPContext::SendReports function in dom/security/nsCSPContext.cpp in Mozilla Firefox before 45.0 and Firefox ESR 38.x before 38.7 does not prevent use of a non-HTTP report-uri for a Content Security Policy (CSP) violation report, which allows remote attackers to cause a denial of service (data overwrite) or possibly gain privileges by specifying a URL of a local file.

CWE-264Permissions, Privileges, and Access Controls

How to fix

Remediation Available

firefoxDebian

Fixed in:45.0-1CVE-2016-1954

firefoxUbuntu

Fixed in:45.0+build2-0ubuntu0.14.04.1USN-2917-1

thunderbirdUbuntu

Fixed in:1:38.7.2+build1-0ubuntu0.14.04.1USN-2934-1

Fixed in:1:38.7.2+build1-0ubuntu0.16.04.1USN-2934-1

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

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

2.34%probability of exploitation in 30 days

82ndpercentile

Elevated risk: more likely to be exploited than 82% of all known CVEs.

References

Patch1

hg.mozilla.org

Vendor Advisory1

mozilla.org

Third-Party Advisory5

Issue Tracking1

bugzilla.mozilla.org

Other references15

Related Vulnerabilities

Other CWE-264 (Permissions, Privileges, and Access Controls) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2012-1456	Medium	4.3	100%	-	-
CVE-2012-1459	Medium	4.3	100%	-	Fix
CVE-2012-1446	Medium	4.3	100%	-	-
CVE-2012-1443	Medium	4.3	100%	-	-
CVE-2012-1442	Medium	4.3	99%	-	-
CVE-2012-1457	Medium	4.3	98%	-	Fix

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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 2026-05-06.