Mozilla: CORS requests should not follow 30x redirections after preflight (MFSA 2015-37)
Published Apr 1, 2015
6.8
MEDIUMCVSS 2.0
EPSS 1.18%
Description
The navigator.sendBeacon implementation in Mozilla Firefox before 37.0, Firefox ESR 31.x before 31.6, and Thunderbird before 31.6 processes HTTP 30x status codes for redirects after a preflight request has occurred, which allows remote attackers to bypass intended CORS access-control checks and conduct cross-site request forgery (CSRF) attacks via a crafted web site, a similar issue to CVE-2014-8638.
Affected products
No data.
- ≤ 36.0.4
- 31.0
- 31.1.0
- 31.1.1
- 31.3.0
- 31.5.1
- 31.5.2
- 31.5.3
- 31.1
- 31.2
- 31.3
- 31.4
- 31.5
- ≤ 31.5
No data.
Red Hat Enterprise Linux 5
firefox-0:31.6.0-2.el5_11
Fixed · RHSA-2015:0766
Red Hat Enterprise Linux 5
thunderbird-0:31.6.0-1.el5_11
Fixed · RHSA-2015:0771
Red Hat Enterprise Linux 6
firefox-0:31.6.0-2.el6_6
Fixed · RHSA-2015:0766
Red Hat Enterprise Linux 6
thunderbird-0:31.6.0-1.el6_6
Fixed · RHSA-2015:0771
Red Hat Enterprise Linux 7
firefox-0:31.6.0-2.ael7b_1
Fixed · RHSA-2015:0766
Red Hat Enterprise Linux 7
thunderbird-0:31.6.0-1.ael7b_1
Fixed · RHSA-2015:0771
Red Hat Enterprise Linux 7
xulrunner-0:31.6.0-2.ael7b_1
Fixed · RHSA-2015:0766
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | firefox-0:31.6.0-2.el5_11 | Fixed | RHSA-2015:0766 |
| Red Hat Enterprise Linux 5 | thunderbird-0:31.6.0-1.el5_11 | Fixed | RHSA-2015:0771 |
| Red Hat Enterprise Linux 6 | firefox-0:31.6.0-2.el6_6 | Fixed | RHSA-2015:0766 |
| Red Hat Enterprise Linux 6 | thunderbird-0:31.6.0-1.el6_6 | Fixed | RHSA-2015:0771 |
| Red Hat Enterprise Linux 7 | firefox-0:31.6.0-2.ael7b_1 | Fixed | RHSA-2015:0766 |
| Red Hat Enterprise Linux 7 | thunderbird-0:31.6.0-1.ael7b_1 | Fixed | RHSA-2015:0771 |
| Red Hat Enterprise Linux 7 | xulrunner-0:31.6.0-2.ael7b_1 | Fixed | RHSA-2015:0766 |
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.
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 (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.18% (0.01175) | 66.40th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.18% (0.01183) | 63.60th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.14% (0.00137) | 31.06th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.31% (0.00314) | 71.06th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.33% (0.00329) | 70.20th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.33% (0.00329) | 66.34th | v3 (v2023.03.01) |
| Mar 6, 2023 | 3.41% (0.03407) | 84.65th | v2 (v2022.01.01) |
| Apr 1, 2022 | 3.41% (0.03407) | 83.10th | v2 (v2022.01.01) |
| Feb 4, 2022 | 3.41% (0.03407) | 66.20th | v2 (v2022.01.01) |
References (21)
- http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00003.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00006.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2015-05/msg00012.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00031.html vendor-advisoryx_refsource_SUSE
- http://rhn.redhat.com/errata/RHSA-2015-0766.html vendor-advisoryx_refsource_REDHAT
- http://rhn.redhat.com/errata/RHSA-2015-0771.html vendor-advisoryx_refsource_REDHAT
- http://www.debian.org/security/2015/dsa-3211 vendor-advisoryx_refsource_DEBIAN
- http://www.debian.org/security/2015/dsa-3212 vendor-advisoryx_refsource_DEBIAN
- http://www.mozilla.org/security/announce/2015/mfsa2015-37.html x_refsource_CONFIRMVendor Advisory
- http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html x_refsource_CONFIRM
- http://www.securityfocus.com/bid/73457 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id/1031996 vdb-entryx_refsource_SECTRACK
- http://www.securitytracker.com/id/1032000 vdb-entryx_refsource_SECTRACK
- http://www.ubuntu.com/usn/USN-2550-1 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-2552-1 vendor-advisoryx_refsource_UBUNTU
- https://access.redhat.com/security/cve/CVE-2015-0807 Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1111834 x_refsource_CONFIRM
- https://bugzilla.redhat.com/show_bug.cgi?id=1207076 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2015-0807
- https://security.gentoo.org/glsa/201512-10 vendor-advisoryx_refsource_GENTOO
- https://www.cve.org/CVERecord?id=CVE-2015-0807
Change history (0)
No recorded changes yet.