Is CVE-2016-5283 in the CISA KEV catalog?

No. CVE-2016-5283 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2016-5283?

CVE-2016-5283 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2016-5283?

CVE-2016-5283 has an EPSS score of 1.49% (71th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2016-5283?

Upgrade firefox on debian unstable to 49.0-1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2016-5283

HIGHEPSS 71th pctl

8.8

CVSS v3

NVD

Description

Mozilla Firefox before 49.0 allows remote attackers to bypass the Same Origin Policy via a crafted fragment identifier in the SRC attribute of an IFRAME element, leading to insufficient restrictions on link-color information after a document is resized.

CWE-284Improper Access Control

How to fix

Remediation Available

firefoxDebian

Fixed in:49.0-1CVE-2016-5283

firefoxUbuntu

Fixed in:49.0+build4-0ubuntu0.14.04.1USN-3076-1

Fixed in:49.0+build4-0ubuntu0.16.04.1USN-3076-1

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

1.49%probability of exploitation in 30 days

71stpercentile

Elevated risk: more likely to be exploited than 71% of all known CVEs.

References

Vendor Advisory1

mozilla.org

Issue Tracking1

bugzilla.mozilla.org

Other references3

Related Vulnerabilities

Other CWE-284 (Improper Access Control) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-27350	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2019-1653	High	7.5	100%	KEV	-
CVE-2023-23752	Medium	5.3	100%	KEV	Fix
CVE-2023-29298	High	7.5	100%	KEV	-
CVE-2023-38205	High	7.5	100%	KEV	-
CVE-2024-27348	Critical	9.8	99%	KEV	Fix

Embed a live status badge for CVE-2016-5283

Markdown

[![CVE-2016-5283](https://tridentstack.com/cve/badge/CVE-2016-5283.svg)](https://tridentstack.com/cve/CVE-2016-5283)

HTML

<a href="https://tridentstack.com/cve/CVE-2016-5283"><img src="https://tridentstack.com/cve/badge/CVE-2016-5283.svg" alt="CVE-2016-5283"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

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.