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CVE-2016-5268

18
FAUCET Score

CVE-2016-5268 describes a spoofing vulnerability in Mozilla Firefox versions prior to 48.0. This flaw allowed remote attackers to craft URLs, specifically using about: URLs for error pages, to display misleading text, thereby facilitating spoofing attacks. Rated as Medium severity with a CVSS score of 4.3, the vulnerability requires user interaction (UI:R) and could lead to low integrity impact (I:L) without affecting confidentiality or availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 47.0.1CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

4.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.23%
Probability of exploitation in next 30 days
EPSS Percentile
65.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0123 is in the 78th percentile among its peer group of 26,221 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2016-5268Moderate

Mozilla: Spoofing attack through text injection into internal error pages (MFSA 2016-83)

Aug 2, 2016

References

lists.opensuse.org / opensuse-security-announce/2016-08/msg00004.html
lists.opensuse.org / opensuse-security-announce/2016-08/msg00029.html
bugzilla.mozilla.org / show_bug.cgi
Issue TrackingPermissions Required
security.gentoo.org / glsa/201701-15
mozilla.org / security/announce/2016/mfsa2016-83.html
Vendor Advisory
securityfocus.com / bid/92260
securitytracker.com / id/1036508
ubuntu.com / usn/USN-3044-1