CVE-2015-7223

NONECVSS 0.0

0.0

The WebExtension APIs in Mozilla Firefox before 43.0 allow remote attackers to gain privileges, and possibly obtain sensitive information or conduct cross-site scripting (XSS) attacks, via a crafted web site.

CVSS v3: —
EG Score: 0.0(none)
EPSS: 73.4%
KEV: Not listed

Published

December 16, 2015

Last Modified

May 6, 2026

References (22)

security@mozillahttp://lists.fedoraproject.org/pipermail/package-announce/2015-December/174083.html
security@mozillahttp://lists.fedoraproject.org/pipermail/package-announce/2015-December/174253.html
security@mozillahttp://lists.opensuse.org/opensuse-updates/2015-12/msg00104.html
security@mozillahttp://lists.opensuse.org/opensuse-updates/2016-02/msg00007.html
security@mozillahttp://lists.opensuse.org/opensuse-updates/2016-02/msg00008.html
security@mozillahttp://www.mozilla.org/security/announce/2015/mfsa2015-148.html
security@mozillahttp://www.securityfocus.com/bid/79280
security@mozillahttp://www.securitytracker.com/id/1034426
security@mozillahttp://www.ubuntu.com/usn/USN-2833-1
security@mozillahttps://bugzilla.mozilla.org/show_bug.cgi?id=1226423
security@mozillahttps://security.gentoo.org/glsa/201512-10
af854a3a-2127-422b-91ae-364da2661108http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174083.html
af854a3a-2127-422b-91ae-364da2661108http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174253.html
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-updates/2015-12/msg00104.html
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-updates/2016-02/msg00007.html

Patch Availability(1)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	firefox (43.0+build1-0ubuntu0.15.10.1) @ wily	2026-05-22	ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

UbuntuUSN-2833-1MEDIUM
Firefox vulnerabilities

Data Freshness Timeline

(refreshed 8× in last 7d / 20× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

2026-06-08 14:14 UTCEPSS rescore
2026-06-07 15:22 UTCEPSS rescore
2026-06-06 13:45 UTCEPSS rescore
2026-06-05 22:44 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-02 20:10 UTCEPSS rescore
2026-06-01 13:49 UTCEPSS rescore
2026-06-01 13:49 UTCEPSS rescore
2026-05-31 22:28 UTCEPSS rescore
2026-05-31 22:28 UTCEPSS rescore
2026-05-31 00:14 UTCEPSS rescore
2026-05-29 13:41 UTCEPSS rescore
2026-05-28 13:42 UTCEPSS rescore
2026-05-28 13:42 UTCEPSS rescore
2026-05-27 13:38 UTCEPSS rescore
2026-05-27 13:38 UTCEPSS rescore
2026-05-26 13:41 UTCEPSS rescore

Frequently asked(4)

What is CVE-2015-7223?

CVE-2015-7223 is a none vulnerability published on December 16, 2015. The WebExtension APIs in Mozilla Firefox before 43.0 allow remote attackers to gain privileges, and possibly obtain sensitive information or conduct cross-site scripting (XSS) attacks, via a crafted web site.

When was CVE-2015-7223 disclosed?

CVE-2015-7223 was first published in the National Vulnerability Database on December 16, 2015, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2015-7223 actively exploited?

CVE-2015-7223 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 73.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-2015-7223?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2015-7223, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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