Mozilla: onbeforeunload and Javascript navigation DOS (MFSA 2014-20)
Published Mar 19, 2014
5.0
MEDIUMCVSS 2.0
EPSS 3.64%
Description
Mozilla Firefox before 28.0 and SeaMonkey before 2.25 allow remote attackers to cause a denial of service (resource consumption and application hang) via onbeforeunload events that trigger background JavaScript execution.
Affected products
No data.
Configuration 1
- 13.1
- 11.4
- 12.3
Configuration 5
- 11
- 11
- 11
- 11
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 and thunderbird 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:L/Au:N/C:N/I:N/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 (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.64% (0.03640) | 89.20th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.54% (0.03541) | 87.74th | v5 (v2026.06.15) |
| Mar 30, 2025 | 2.26% (0.02256) | 83.12th | v4 (v2025.03.14) |
| Mar 29, 2025 | 6.84% (0.06836) | 85.21th | v4 (v2025.03.14) |
| Mar 17, 2025 | 2.26% (0.02256) | 83.44th | v4 (v2025.03.14) |
| Dec 17, 2024 | 1.16% (0.01162) | 84.65th | v3 (v2023.03.01) |
| Jan 30, 2024 | 3.24% (0.03240) | 90.29th | v3 (v2023.03.01) |
| Sep 13, 2023 | 2.31% (0.02311) | 88.35th | v3 (v2023.03.01) |
| Mar 7, 2023 | 2.30% (0.02296) | 87.93th | v3 (v2023.03.01) |
| Mar 6, 2023 | 5.47% (0.05470) | 89.98th | v2 (v2022.01.01) |
| Apr 1, 2022 | 5.47% (0.05470) | 89.00th | v2 (v2022.01.01) |
| Feb 4, 2022 | 5.47% (0.05470) | 76.60th | v2 (v2022.01.01) |
References (12)
- http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00016.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00017.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00022.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2014-04/msg00016.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://www.mozilla.org/security/announce/2014/mfsa2014-20.html x_refsource_CONFIRMVendor Advisory
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html x_refsource_CONFIRMThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2014-1500 Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=956524 x_refsource_CONFIRMIssue TrackingVendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1077020 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2014-1500
- https://security.gentoo.org/glsa/201504-01 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2014-1500
Change history (0)
No recorded changes yet.