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Fencer Intel
medium 6.8

CVE-2015-0807 json

The navigator.sendBeacon implementation in Mozilla Firefox before 37.0, Firefox ESR 31.x before 31.6, and Thunderbird before 31.6 processes…

published 2015-04-01 11 y ago modified 2026-06-17 4 mo ago also EUVD-2015-0820

cvss
6.8
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 63%
public exploits
0
none known

Summary

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.

Patch / fix

  • firefox Ubuntu 14.04 LTS 37.0+build2-0ubuntu0.14.04.1
  • thunderbird Ubuntu 14.04 LTS 1:31.6.0+build1-0ubuntu0.14.04.1

ubuntu advisories UBUNTU-CVE-2015-0807

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • thunderbird RHEL 5 PRODUCTIVITY, RHEL 5 31.6.0-1.el5_11
  • thunderbird RHEL 6 31.6.0-1.el6_6
  • thunderbird RHEL 7 31.6.0-1.el7_1
  • thunderbird RHEL 7 31.6.0-1.ael7b_1
  • firefox RHEL 5 31.6.0-2.el5_11
  • firefox RHEL 6 31.6.0-2.el6_6
  • firefox RHEL 7 31.6.0-2.el7_1
  • xulrunner RHEL 7 31.6.0-2.el7_1

red hat advisories RHSA-2015:0771RHSA-2015:0766

  • MozillaFirefox SLES 12, SLED 12, SLE Software Development Kit 12 +1 more 31.6.0esr-30.1

suse advisories SUSE-SU-2015:0704-2SUSE-SU-2015:0704-1

  • firefox-esr openSUSE Tumbleweed 128.5.1-1.1
  • MozillaFirefox openSUSE Tumbleweed 50.1.0-1.1
  • MozillaThunderbird openSUSE Tumbleweed 45.5.1-1.1

opensuse advisories openSUSE-SU-2024:14572-1openSUSE-SU-2024:10071-1openSUSE-SU-2024:10230-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2015-0807 updated cvss 4.3

Mozilla: CORS requests should not follow 30x redirections after preflight (MFSA 2015-37)

  • Red Hat Enterprise Linux (v. 5 server) firefox 31.6.0-2.el5_11 Red Hat Enterprise Linux Client (v. 7) firefox 31.6.0-2.el7_1, xulrunner 31.6.0-2.el7_1, thunderbird 31.6.0-1.el7_1 Red Hat Enterprise Linux Client Optional (v. 7) firefox 31.6.0-2.el7_1 Red Hat Enterprise Linux ComputeNode Optional (v. 7) xulrunner 31.6.0-2.el7_1 Red Hat Enterprise Linux Desktop (v. 5 client) firefox 31.6.0-2.el5_11, thunderbird 31.6.0-1.el5_11 Red Hat Enterprise Linux Desktop (v. 6) firefox 31.6.0-2.el6_6, thunderbird 31.6.0-1.el6_6
    +2 more products
    Red Hat Enterprise Linux Desktop Optional (v. 6) firefox 31.6.0-2.el6_6 Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox 31.6.0-2.el6_6
    fixed: vendor fix RHSA-2015:0766
  • Red Hat Enterprise Linux Optional Productivity Applications (v. 5 server) thunderbird 31.6.0-1.el5_11
    fixed: vendor fix RHSA-2015:0771
  • Red Hat Enterprise Linux Server (v. 6) firefox 31.6.0-2.el6_6 Red Hat Enterprise Linux Server (v. 7) firefox 31.6.0-2.el7_1, firefox 31.6.0-2.ael7b_1, xulrunner 31.6.0-2.el7_1, xulrunner 31.6.0-2.ael7b_1 Red Hat Enterprise Linux Server Optional (v. 6) firefox 31.6.0-2.el6_6, thunderbird 31.6.0-1.el6_6 Red Hat Enterprise Linux Server Optional (v. 7) firefox 31.6.0-2.el7_1, xulrunner 31.6.0-2.el7_1, thunderbird 31.6.0-1.el7_1, thunderbird 31.6.0-1.ael7b_1 Red Hat Enterprise Linux Workstation (v. 6) firefox 31.6.0-2.el6_6, thunderbird 31.6.0-1.el6_6 Red Hat Enterprise Linux Workstation (v. 7) firefox 31.6.0-2.el7_1, xulrunner 31.6.0-2.el7_1, thunderbird 31.6.0-1.el7_1
    +2 more products
    Red Hat Enterprise Linux Workstation Optional (v. 6) firefox 31.6.0-2.el6_6 Red Hat Enterprise Linux Workstation Optional (v. 7) firefox 31.6.0-2.el7_1
    fixed: vendor fix RHSA-2015:0766

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.02% chance of exploitation in the next 30 days, higher than 63% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-352 Cross-Site Request Forgery

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.