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TI-2015-03798 Aliases CVE-2015-4520GHSA-47pc-q6hv-5vfj

Mozilla Firefox before 41.0 and Firefox ESR 38.x before 38.3 allow remote attackers to…

Priority LOW 33CWE-254Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Partial · Partial · None
Fix status
Fixed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat.

Summary

Mozilla Firefox before 41.0 and Firefox ESR 38.x before 38.3 allow remote attackers to bypass CORS preflight protection mechanisms by leveraging (1) duplicate cache-key generation or (2) retrieval of a value from an incorrect HTTP Access-Control-* response header.

Why it matters now

EPSS 0.02606 85th percentileScored 2026-11-07
Fix Fixed Red Hat: 2 advisories

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 8

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox:38.0:*:*:*:*:*:*:*38.0VulnerableMozilla
cpe:2.3:a:mozilla:firefox:38.0.1:*:*:*:*:*:*:*38.0.1VulnerableMozilla
cpe:2.3:a:mozilla:firefox:38.0.5:*:*:*:*:*:*:*38.0.5VulnerableMozilla
cpe:2.3:a:mozilla:firefox:38.1.0:*:*:*:*:*:*:*38.1.0VulnerableMozilla
cpe:2.3:a:mozilla:firefox:38.1.1:*:*:*:*:*:*:*38.1.1VulnerableMozilla
cpe:2.3:a:mozilla:firefox:38.2.0:*:*:*:*:*:*:*38.2.0VulnerableMozilla
cpe:2.3:a:mozilla:firefox:38.2.1:*:*:*:*:*:*:*38.2.1VulnerableMozilla
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*up to 40.0.3VulnerableMozilla
  • cpe:2.3:a:mozilla:firefox:38.0:*:*:*:*:*:*:* Versions 38.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:firefox:38.0.1:*:*:*:*:*:*:* Versions 38.0.1 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:firefox:38.0.5:*:*:*:*:*:*:* Versions 38.0.5 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:firefox:38.1.0:*:*:*:*:*:*:* Versions 38.1.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:firefox:38.1.1:*:*:*:*:*:*:* Versions 38.1.1 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:firefox:38.2.0:*:*:*:*:*:*:* Versions 38.2.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:firefox:38.2.1:*:*:*:*:*:*:* Versions 38.2.1 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions up to 40.0.3 Vulnerable ·Mozilla

Remediation

Red Hat 2 advisories

  • RHSA-2015:1852 Released 2015-10-01 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux Client (v. 7) thunderbird-38.3.0-1.el7_1
    • Red Hat Enterprise Linux Desktop (v. 5 client) thunderbird-38.3.0-1.el5_11, thunderbird-38.3.0-1.el5_11.i386
    • Red Hat Enterprise Linux Desktop (v. 6) thunderbird-38.3.0-1.el6_7
    • Red Hat Enterprise Linux Optional Productivity Applications (v. 5 server) thunderbird-38.3.0-1.el5_11, thunderbird-38.3.0-1.el5_11.i386
    • Red Hat Enterprise Linux Server Optional (v. 6) thunderbird-38.3.0-1.el6_7
    • Red Hat Enterprise Linux Server Optional (v. 7) thunderbird-38.3.0-1.ael7b_1, thunderbird-38.3.0-1.el7_1
    • Red Hat Enterprise Linux Workstation (v. 6) thunderbird-38.3.0-1.el6_7
    • Red Hat Enterprise Linux Workstation (v. 7) thunderbird-38.3.0-1.el7_1
  • RHSA-2015:1834 Released 2015-09-22 · Red Hat rating Critical
    firefox security update
    • Red Hat Enterprise Linux (v. 5 server) firefox-38.3.0-2.el5_11, firefox-38.3.0-2.el5_11.i386
    • Red Hat Enterprise Linux Client (v. 7) firefox-38.3.0-2.el7_1
    • Red Hat Enterprise Linux Client Optional (v. 7) firefox-38.3.0-2.el7_1
    • Red Hat Enterprise Linux Desktop (v. 5 client) firefox-38.3.0-2.el5_11, firefox-38.3.0-2.el5_11.i386
    • Red Hat Enterprise Linux Desktop (v. 6) firefox-38.3.0-2.el6_7
    • Red Hat Enterprise Linux Desktop Optional (v. 6) firefox-38.3.0-2.el6_7
    • Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox-38.3.0-2.el6_7
    • Red Hat Enterprise Linux Server (v. 6) firefox-38.3.0-2.el6_7
    • Red Hat Enterprise Linux Server (v. 7) firefox-38.3.0-2.ael7b_1, firefox-38.3.0-2.el7_1
    • Red Hat Enterprise Linux Server Optional (v. 6) firefox-38.3.0-2.el6_7, firefox-38.3.0-2.el6_7.ppc
    • Red Hat Enterprise Linux Server Optional (v. 7) firefox-38.3.0-2.el7_1, firefox-38.3.0-2.el7_1.ppc
    • Red Hat Enterprise Linux Workstation (v. 6) firefox-38.3.0-2.el6_7
    • Red Hat Enterprise Linux Workstation (v. 7) firefox-38.3.0-2.el7_1
    • Red Hat Enterprise Linux Workstation Optional (v. 6) firefox-38.3.0-2.el6_7
    • Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-38.3.0-2.el7_1

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux (v. 5 server)Fixed RHSA-2015:1834
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2015:1834, RHSA-2015:1852
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2015:1834
Red Hat Enterprise Linux Desktop (v. 5 client)Fixed RHSA-2015:1834, RHSA-2015:1852
Red Hat Enterprise Linux Desktop (v. 6)Fixed RHSA-2015:1834, RHSA-2015:1852
Red Hat Enterprise Linux Desktop Optional (v. 6)Fixed RHSA-2015:1834
Red Hat Enterprise Linux HPC Node Optional (v. 6)Fixed RHSA-2015:1834
Red Hat Enterprise Linux Optional Productivity Applications (v. 5 server)Fixed RHSA-2015:1852
Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2015:1834
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2015:1834
Red Hat Enterprise Linux Server Optional (v. 6)Fixed RHSA-2015:1834, RHSA-2015:1852
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2015:1834, RHSA-2015:1852
Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2015:1834, RHSA-2015:1852
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2015:1834, RHSA-2015:1852
Red Hat Enterprise Linux Workstation Optional (v. 6)Fixed RHSA-2015:1834
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2015:1834

Timeline

  1. 2026-10-02 Threatist record created from CVE-2015-4520
  2. 2026-10-03 Alias added: GHSA-47pc-q6hv-5vfj

References

Advisory 15

Other 4

  • TI-2024-08981 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-09832 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.6
  • TI-2019-08769 Improper input validation in Mozilla Firefox ESR KEVCVSS 3.1CRITICAL 10.0
  • TI-2010-03577 Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before… KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-04799 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
  • TI-2023-04477 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
See all 3444 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences