Mozilla: Javascript: URLs run in privileged context on New Tab page (MFSA 2012-95)
Published Nov 21, 2012
6.8
MEDIUMCVSS 2.0
EPSS 3.26%
Description
The New Tab page in Mozilla Firefox before 17.0 uses a privileged context for execution of JavaScript code by bookmarklets, which allows user-assisted remote attackers to run arbitrary programs by leveraging a javascript: URL in a bookmark.
Affected products
No data.
- ≤ 16.0.2
- 0.1
- 0.2
- 0.3
- 0.4
- 0.5
- 0.6
- 0.6.1
- 0.7
- 0.7.1
- 0.8
- 0.9
- 0.9
- 0.9.1
- 0.9.2
- 0.9.3
- 0.10
- 0.10.1
- 1.0
- 1.0
- 1.0.1
- 1.0.2
- 1.0.3
- 1.0.4
- 1.0.5
- 1.0.6
- 1.0.7
- 1.0.8
- 1.4.1
- 1.5
- 1.5
- 1.5
- 1.5.0.1
- 1.5.0.2
- 1.5.0.3
- 1.5.0.4
- 1.5.0.5
- 1.5.0.6
- 1.5.0.7
- 1.5.0.8
- 1.5.0.9
- 1.5.0.10
- 1.5.0.11
- 1.5.0.12
- 1.5.1
- 1.5.2
- 1.5.3
- 1.5.4
- 1.5.5
- 1.5.6
- 1.5.7
- 1.5.8
- 1.8
- 2.0
- 2.0.0.1
- 2.0.0.2
- 2.0.0.3
- 2.0.0.4
- 2.0.0.5
- 2.0.0.6
- 2.0.0.7
- 2.0.0.8
- 2.0.0.9
- 2.0.0.10
- 2.0.0.11
- 2.0.0.12
- 2.0.0.13
- 2.0.0.14
- 2.0.0.15
- 2.0.0.16
- 2.0.0.17
- 2.0.0.18
- 2.0.0.19
- 2.0.0.20
- 3.0
- 3.0.1
- 3.0.2
- 3.0.3
- 3.0.4
- 3.0.5
- 3.0.6
- 3.0.7
- 3.0.8
- 3.0.9
- 3.0.10
- 3.0.11
- 3.0.12
- 3.0.13
- 3.0.14
- 3.0.15
- 3.0.16
- 3.0.17
- 3.5
- 3.5.1
- 3.5.2
- 3.5.3
- 3.5.4
- 3.5.5
- 3.5.6
- 3.5.7
- 3.5.8
- 3.5.9
- 3.5.10
- 3.5.11
- 3.5.12
- 3.5.13
- 3.5.14
- 3.5.15
- 3.6
- 3.6.2
- 3.6.3
- 3.6.4
- 3.6.6
- 3.6.7
- 3.6.8
- 3.6.9
- 3.6.10
- 3.6.11
- 3.6.12
- 3.6.13
- 3.6.14
- 3.6.15
- 3.6.16
- 3.6.17
- 3.6.18
- 3.6.19
- 3.6.20
- 3.6.21
- 3.6.22
- 3.6.23
- 3.6.24
- 3.6.25
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0.1
- 5.0
- 5.0.1
- 6.0
- 6.0.1
- 6.0.2
- 7.0
- 7.0.1
- 8.0
- 8.0.1
- 9.0
- 9.0.1
- 10.0
- 10.0.1
- 10.0.2
- 11.0
- 12.0
- 12.0
- 13.0
- 13.0.1
- 14.0
- 14.0.1
- 15.0
- 15.0.1
- 16.0
- 16.0.1
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
| 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 |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue does not affect the version of firefox as shipped with Red Hat Enterprise Linux 5 and 6
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:P/I:P/A:P
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 (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.26% (0.03263) | 87.97th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.26% (0.03263) | 86.73th | v5 (v2026.06.15) |
| Mar 30, 2025 | 1.78% (0.01784) | 81.08th | v4 (v2025.03.14) |
| Mar 29, 2025 | 5.26% (0.05260) | 82.94th | v4 (v2025.03.14) |
| Mar 17, 2025 | 2.33% (0.02329) | 83.71th | v4 (v2025.03.14) |
| Feb 3, 2025 | 7.00% (0.07004) | 93.95th | v3 (v2023.03.01) |
| Dec 12, 2024 | 5.62% (0.05619) | 93.57th | v3 (v2023.03.01) |
| Mar 7, 2023 | 5.53% (0.05532) | 92.02th | v3 (v2023.03.01) |
| Mar 6, 2023 | 9.92% (0.09915) | 94.52th | v2 (v2022.01.01) |
| Apr 1, 2022 | 9.92% (0.09915) | 94.04th | v2 (v2022.01.01) |
| Feb 4, 2022 | 9.92% (0.09915) | 87.53th | v2 (v2022.01.01) |
References (18)
- http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00021.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2013-01/msg00022.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-updates/2012-11/msg00090.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-updates/2012-11/msg00093.html vendor-advisoryx_refsource_SUSE
- http://secunia.com/advisories/51369 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/51434 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/51439 third-party-advisoryx_refsource_SECUNIA
- http://www.mozilla.org/security/announce/2012/mfsa2012-95.html x_refsource_CONFIRMVendor Advisory
- http://www.securityfocus.com/bid/56623 vdb-entryx_refsource_BID
- http://www.ubuntu.com/usn/USN-1638-1 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-1638-2 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-1638-3 vendor-advisoryx_refsource_UBUNTU
- https://access.redhat.com/security/cve/CVE-2012-4203 Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=765628 x_refsource_CONFIRM
- https://bugzilla.redhat.com/show_bug.cgi?id=877618 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2012-4203
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16503 vdb-entrysignaturex_refsource_OVAL
- https://www.cve.org/CVERecord?id=CVE-2012-4203
Change history (0)
No recorded changes yet.