Mozilla: Location bar spoofing via data URLs with malformed/invalid mediatypes (MFSA 2016-66)
Published Aug 5, 2016
4.3
MEDIUMCVSS 3.0
EPSS 1.47%
Description
Mozilla Firefox before 48.0 allows remote attackers to spoof the location bar via crafted characters in the media type of a data: URL.
Affected products
No data.
No data.
Red Hat Enterprise Linux 5
firefox
Not affected
Red Hat Enterprise Linux 5
thunderbird
Not affected
Red Hat Enterprise Linux 6
firefox
Not affected
Red Hat Enterprise Linux 6
thunderbird
Not affected
Red Hat Enterprise Linux 7
firefox
Not affected
Red Hat Enterprise Linux 7
thunderbird
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | firefox | Not affected | n/a |
| Red Hat Enterprise Linux 5 | thunderbird | Not affected | n/a |
| Red Hat Enterprise Linux 6 | firefox | Not affected | n/a |
| Red Hat Enterprise Linux 6 | thunderbird | Not affected | n/a |
| Red Hat Enterprise Linux 7 | firefox | Not affected | n/a |
| Red Hat Enterprise Linux 7 | thunderbird | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue does not affect the version of firefox and thunderbird as shipped with Red Hat Enterprise Linux 5, 6 and 7.
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:N/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 | 1.47% (0.01473) | 72.86th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.48% (0.01478) | 70.42th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.49% (0.00489) | 63.49th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.59% (0.00591) | 79.03th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.59% (0.00591) | 77.63th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.59% (0.00591) | 74.97th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.41% (0.01408) | 72.89th | v2 (v2022.01.01) |
| Mar 2, 2023 | 1.41% (0.01408) | 72.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.41% (0.01408) | 70.87th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.41% (0.01408) | 49.94th | v2 (v2022.01.01) |
References (13)
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00004.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00029.html vendor-advisoryx_refsource_SUSE
- http://www.mozilla.org/security/announce/2016/mfsa2016-66.html x_refsource_CONFIRMVendor Advisory
- http://www.securityfocus.com/bid/92260 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id/1036508 vdb-entryx_refsource_SECTRACK
- http://www.ubuntu.com/usn/USN-3044-1 vendor-advisoryx_refsource_UBUNTU
- https://access.redhat.com/security/cve/CVE-2016-5251 Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1255570 x_refsource_CONFIRMIssue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=1361978 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2016-5251
- https://security.gentoo.org/glsa/201701-15 vendor-advisoryx_refsource_GENTOO
- https://www.cve.org/CVERecord?id=CVE-2016-5251
- https://www.mozilla.org/security/announce/2016/mfsa2016-66.html
| Link | Providers | Tags |
|---|---|---|
| http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00004.html | vendor-advisoryx_refsource_SUSE | |
| http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00029.html | vendor-advisoryx_refsource_SUSE | |
| http://www.mozilla.org/security/announce/2016/mfsa2016-66.html | x_refsource_CONFIRMVendor Advisory | |
| http://www.securityfocus.com/bid/92260 | vdb-entryx_refsource_BID | |
| http://www.securitytracker.com/id/1036508 | vdb-entryx_refsource_SECTRACK | |
| http://www.ubuntu.com/usn/USN-3044-1 | vendor-advisoryx_refsource_UBUNTU | |
| https://access.redhat.com/security/cve/CVE-2016-5251 | Vendor Advisory | |
| https://bugzilla.mozilla.org/show_bug.cgi?id=1255570 | x_refsource_CONFIRMIssue Tracking | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1361978 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2016-5251 | ||
| https://security.gentoo.org/glsa/201701-15 | vendor-advisoryx_refsource_GENTOO | |
| https://www.cve.org/CVERecord?id=CVE-2016-5251 | ||
| https://www.mozilla.org/security/announce/2016/mfsa2016-66.html |
Change history (0)
No recorded changes yet.