Skip to content
Fencer Intel
high 7.5

CVE-2015-4492 json

Use-after-free vulnerability in the XMLHttpRequest::Open implementation in Mozilla Firefox before 40.0 and Firefox ESR 38.x before 38.2 mig…

published 11y ago modified 4mo ago also EUVD-2015-4512

cvss
7.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.5%
EPSS 4.5% chance of exploitation in 30 days, percentile 91%
public exploits
0
none known

Summary

Use-after-free vulnerability in the XMLHttpRequest::Open implementation in Mozilla Firefox before 40.0 and Firefox ESR 38.x before 38.2 might allow remote attackers to execute arbitrary code via a SharedWorker object that makes recursive calls to the open method of an XMLHttpRequest object.

Patch / fix

  • firefox Ubuntu 14.04 LTS 40.0+build4-0ubuntu0.14.04.1

ubuntu advisories UBUNTU-CVE-2015-4492

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 38.2.0-4.el5_11
  • firefox RHEL 6 38.2.0-4.el6_7
  • firefox RHEL 7 38.2.0-4.el7_1

red hat advisories RHSA-2015:1586

  • mozilla-nss SLES for SAP 11 SP4, SLES for SAP 11 SP3, SLES 11 SP4 +6 more 3.19.2.0-0.16.1
  • MozillaFirefox SLES for SAP 11 SP4, SLES for SAP 11 SP3, SLES 11 SP4 +6 more 38.2.1esr-19.3
  • MozillaFirefox-branding-SLED SLES for SAP 11 SP4, SLES for SAP 11 SP3, SLES 11 SP4 +4 more 31.0-0.12.51
  • mozilla-nss SLES for SAP 12, SLES 12, SLED 12 +1 more 3.19.2.0-26.2
  • MozillaFirefox SLES for SAP 12, SLES 12, SLED 12 +1 more 38.2.1esr-45.1
  • MozillaFirefox-branding-SLE SLES for SAP 12, SLES 12, SLED 12 31.0-14.1
  • mozilla-nss SLES 11 SP2-LTSS, SLES 11 SP1-TERADATA, SLES 11 SP1-LTSS 3.19.2.0-0.7.1
  • firefox-gcc47 SLES 11 SP2-LTSS, SLES 11 SP1-TERADATA, SLES 11 SP1-LTSS 4.7.2_20130108-0.37.2

suse advisories SUSE-SU-2015:1528-1SUSE-SU-2015:1476-1SUSE-SU-2015:1449-1

  • 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

Is CVE-2015-4492 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

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-2015-4492 updated cvss 5.1

Mozilla: Use-after-free in XMLHttpRequest with shared workers (MFSA 2015-92)

  • Red Hat Enterprise Linux (v. 5 server) firefox 38.2.0-4.el5_11 Red Hat Enterprise Linux Client (v. 7) firefox 38.2.0-4.el7_1 Red Hat Enterprise Linux Client Optional (v. 7) firefox 38.2.0-4.el7_1 Red Hat Enterprise Linux Desktop (v. 5 client) firefox 38.2.0-4.el5_11 Red Hat Enterprise Linux Desktop (v. 6) firefox 38.2.0-4.el6_7 Red Hat Enterprise Linux Desktop Optional (v. 6) firefox 38.2.0-4.el6_7
    +9 more products
    Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox 38.2.0-4.el6_7 Red Hat Enterprise Linux Server (v. 6) firefox 38.2.0-4.el6_7 Red Hat Enterprise Linux Server (v. 7) firefox 38.2.0-4.el7_1, firefox 38.2.0-4.ael7b_1 Red Hat Enterprise Linux Server Optional (v. 6) firefox 38.2.0-4.el6_7 Red Hat Enterprise Linux Server Optional (v. 7) firefox 38.2.0-4.el7_1 Red Hat Enterprise Linux Workstation (v. 6) firefox 38.2.0-4.el6_7 Red Hat Enterprise Linux Workstation (v. 7) firefox 38.2.0-4.el7_1 Red Hat Enterprise Linux Workstation Optional (v. 6) firefox 38.2.0-4.el6_7 Red Hat Enterprise Linux Workstation Optional (v. 7) firefox 38.2.0-4.el7_1
    fixed: vendor fix RHSA-2015:1586
  • Red Hat Enterprise Linux 5 thunderbird Red Hat Enterprise Linux 6 thunderbird Red Hat Enterprise Linux 7 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

4.48% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

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.