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CVE-2015-7223

14
FAUCET Score

CVE-2015-7223 describes a privilege escalation vulnerability in Mozilla Firefox versions prior to 43.0, specifically within its WebExtension APIs. This flaw could allow remote attackers to gain elevated privileges, potentially leading to sensitive information disclosure or cross-site scripting (XSS) attacks through a specially crafted website. The vulnerability has a CVSS score of 4.0, indicating a medium severity. It is network-attackable with high access complexity, requiring no authentication, and could result in partial confidentiality and integrity impacts. There is no evidence of active exploitation, and no public exploit code is available in Metasploit, Nuclei, or ExploitDB. While there is limited community discussion and media coverage, the vulnerability is not listed on the KEV catalog and is considered inactive on the Hot List.

Impacted Technologies

VendorProductVersion(s)CPE
22CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:22:*:*:*:*:*:*:*
23CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:23:*:*:*:*:*:*:*
<= 42.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
42.1CPE matchmatch criteria
cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:*
13.1CPE matchmatch criteria
cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.0MEDIUM

AV:N/AC:H/Au:N/C:P/I:P/A:N

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
HIGH
Authentication
NONE
Exploitability Score
4.9
Impact Score
4.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.78%
Probability of exploitation in next 30 days
EPSS Percentile
75.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0178 is in the 55th percentile among its peer group of 19,958 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.0 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-2015-7223Critical

Mozilla: Privilege escalation vulnerabilities in WebExtension APIs (MFSA 2015-148)

Dec 16, 2015

References

lists.fedoraproject.org / pipermail/package-announce/2015-December/174083.html
Third Party Advisory
lists.fedoraproject.org / pipermail/package-announce/2015-December/174253.html
Third Party Advisory
lists.opensuse.org / opensuse-updates/2015-12/msg00104.html
lists.opensuse.org / opensuse-updates/2016-02/msg00007.html
Third Party Advisory
lists.opensuse.org / opensuse-updates/2016-02/msg00008.html
Third Party Advisory
bugzilla.mozilla.org / show_bug.cgi
Issue Tracking
security.gentoo.org / glsa/201512-10
mozilla.org / security/announce/2015/mfsa2015-148.html
Vendor Advisory
securityfocus.com / bid/79280
securitytracker.com / id/1034426
ubuntu.com / usn/USN-2833-1