Is CVE-2015-4495 in the CISA KEV catalog?

Yes. CVE-2015-4495 is on the CISA Known Exploited Vulnerabilities list, added 2022-05-25.

What is the CVSS severity of CVE-2015-4495?

CVE-2015-4495 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2015-4495?

CVE-2015-4495 has an EPSS score of 70.23% (99th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2015-4495?

Upgrade pdf.js on debian 11 to 1.1.366+dfsg-1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2015-4495

HIGHCISA KEVEPSS 99th pctl

8.8

CVSS v3

NVD

Description

The PDF reader in Mozilla Firefox before 39.0.3, Firefox ESR 38.x before 38.1.1, and Firefox OS before 2.2 allows remote attackers to bypass the Same Origin Policy, and read arbitrary files or gain privileges, via vectors involving crafted JavaScript code and a native setter, as exploited in the wild in August 2015.

CWE-346

How to fix

Remediation Available

pdf.jsDebian

Fixed in:1.1.366+dfsg-1CVE-2015-4495

firefoxUbuntu

Fixed in:39.0.3+build2-0ubuntu0.14.04.1USN-2707-1

DeveloperEditionWindows application

Affected:38.0 38.1.1Fixed in:38.1.1Mozilla

Affected:39.0.3Fixed in:39.0.3Mozilla

Mozilla Firefox (en-US)Windows application

Affected:38.0 38.1.1Fixed in:38.1.1Mozilla

Affected:39.0.3Fixed in:39.0.3Mozilla

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

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

Exploit Intelligence

70.23%probability of exploitation in 30 days

99thpercentile

Very high risk: more likely to be exploited than 99% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Mozilla Firefox Security Feature Bypass Vulnerability

Moxilla Firefox allows remote attackers to bypass the Same Origin Policy to read arbitrary files or gain privileges.

Apply updates per vendor instructions.

Remediation due: 2022-06-15

References

Patch1

oracle.com

Exploit1

exploit-db.com

Vendor Advisory2

Third-Party Advisory11

Government Resource1

cisa.gov

Issue Tracking2

Related Vulnerabilities

Other CWE-346 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2009-1185	High	7.2	82%	-	Fix
CVE-2025-34291	High	8.8	79%	KEV	-
CVE-2020-16952	High	8.6	71%	-	-
CVE-2023-29711	Critical	9.8	70%	-	-
CVE-2024-23898	High	8.8	67%	-	Fix
CVE-2021-21135	Medium	6.5	19%	-	Fix

Embed a live status badge for CVE-2015-4495

Markdown

[![CVE-2015-4495](https://tridentstack.com/cve/badge/CVE-2015-4495.svg)](https://tridentstack.com/cve/CVE-2015-4495)

HTML

<a href="https://tridentstack.com/cve/CVE-2015-4495"><img src="https://tridentstack.com/cve/badge/CVE-2015-4495.svg" alt="CVE-2015-4495"></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.

See how it works Start freeThis CVE lookup is free and always will be.

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 2026-04-22.