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Fencer Intel
medium 5.0

CVE-2014-1583 json

The Alarm API in Mozilla Firefox before 33.0 and Firefox ESR 31.x before 31.2 does not properly restrict toJSON calls, which allows remote…

published 2014-10-15 12 y ago modified 2026-06-17 4 mo ago also EUVD-2014-1659

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.9%
EPSS 2.9% chance of exploitation in 30 days, percentile 86%
public exploits
0
none known

Summary

The Alarm API in Mozilla Firefox before 33.0 and Firefox ESR 31.x before 31.2 does not properly restrict toJSON calls, which allows remote attackers to bypass the Same Origin Policy via crafted API calls that access sensitive information within the JSON data of an alarm.

Patch / fix

  • firefox Ubuntu 14.04 LTS 33.0+build2-0ubuntu0.14.04.1

ubuntu advisories UBUNTU-CVE-2014-1583

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

  • firefox RHEL 5 31.2.0-3.el5_11
  • firefox RHEL 6 31.2.0-3.el6_6
  • firefox RHEL 7 31.2.0-3.el7_0
  • xulrunner RHEL 7 31.2.0-1.el7_0

red hat advisories RHSA-2014:1635

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

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

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-2014-1583 updated cvss 4.3

Mozilla: Accessing cross-origin objects via the Alarms API (MFSA 2014-82)

  • Red Hat Enterprise Linux (v. 5 server) firefox 31.2.0-3.el5_11 Red Hat Enterprise Linux Client (v. 7) firefox 31.2.0-3.el7_0, xulrunner 31.2.0-1.el7_0 Red Hat Enterprise Linux Client Optional (v. 7) firefox 31.2.0-3.el7_0 Red Hat Enterprise Linux ComputeNode Optional (v. 7) xulrunner 31.2.0-1.el7_0 Red Hat Enterprise Linux Desktop (v. 5 client) firefox 31.2.0-3.el5_11 Red Hat Enterprise Linux Desktop (v. 6) firefox 31.2.0-3.el6_6
    +10 more products
    Red Hat Enterprise Linux Desktop Optional (v. 6) firefox 31.2.0-3.el6_6 Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox 31.2.0-3.el6_6 Red Hat Enterprise Linux Server (v. 6) firefox 31.2.0-3.el6_6 Red Hat Enterprise Linux Server (v. 7) firefox 31.2.0-3.el7_0, xulrunner 31.2.0-1.el7_0 Red Hat Enterprise Linux Server Optional (v. 6) firefox 31.2.0-3.el6_6 Red Hat Enterprise Linux Server Optional (v. 7) firefox 31.2.0-3.el7_0, xulrunner 31.2.0-1.el7_0 Red Hat Enterprise Linux Workstation (v. 6) firefox 31.2.0-3.el6_6 Red Hat Enterprise Linux Workstation (v. 7) firefox 31.2.0-3.el7_0, xulrunner 31.2.0-1.el7_0 Red Hat Enterprise Linux Workstation Optional (v. 6) firefox 31.2.0-3.el6_6 Red Hat Enterprise Linux Workstation Optional (v. 7) firefox 31.2.0-3.el7_0
    fixed: vendor fix RHSA-2014:1635
  • Red Hat Enterprise Linux 5 thunderbird Red Hat Enterprise Linux 6 thunderbird
    not affected: vulnerable code not present

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

2.86% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:P/I:N/A:N

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.