Mozilla: Elevation of privilege with chrome.tabs.update API in web extensions (MFSA 2016-46)
Published Apr 30, 2016
5.4
MEDIUMCVSS 3.0
EPSS 1.25%
Description
The WebExtension sandbox feature in browser/components/extensions/ext-tabs.js in Mozilla Firefox before 46.0 does not properly restrict principal inheritance during chrome.tabs.create and chrome.tabs.update API calls, which allows remote attackers to conduct Universal XSS (UXSS) attacks via a crafted extension that accesses a (1) javascript: or (2) data: URL.
Affected products
No data.
No data.
Red Hat Enterprise Linux 5
firefox
Not affected
Red Hat Enterprise Linux 6
firefox
Not affected
Red Hat Enterprise Linux 7
firefox
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | firefox | Not affected | n/a |
| Red Hat Enterprise Linux 6 | firefox | Not affected | n/a |
| Red Hat Enterprise Linux 7 | firefox | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
AV:N/AC:M/Au:N/C:N/I:P/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.25% (0.01252) | 68.36th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.25% (0.01252) | 65.46th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.40% (0.00399) | 58.54th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.68% (0.00684) | 80.70th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.68% (0.00684) | 79.41th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.68% (0.00684) | 76.93th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.78% (0.01776) | 76.86th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.78% (0.01776) | 76.81th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.78% (0.01776) | 74.78th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.78% (0.01776) | 53.99th | v2 (v2022.01.01) |
References (14)
- http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00005.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-updates/2016-05/msg00038.html vendor-advisoryx_refsource_SUSE
- http://www.mozilla.org/security/announce/2016/mfsa2016-46.html x_refsource_CONFIRMVendor Advisory
- http://www.securitytracker.com/id/1035692 vdb-entryx_refsource_SECTRACK
- http://www.ubuntu.com/usn/USN-2936-1 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-2936-2 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-2936-3 vendor-advisoryx_refsource_UBUNTU
- https://access.redhat.com/security/cve/CVE-2016-2817 Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1227462 x_refsource_CONFIRM
- https://bugzilla.redhat.com/show_bug.cgi?id=1330285 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2016-2817
- https://security.gentoo.org/glsa/201701-15 vendor-advisoryx_refsource_GENTOO
- https://www.cve.org/CVERecord?id=CVE-2016-2817
- https://www.mozilla.org/security/announce/2016/mfsa2016-46.html
Change history (0)
No recorded changes yet.