Mozilla Firefox before 42.0 and Firefox ESR 38.x before 38.4 improperly follow the CORS…
Priority LOW 38CWE-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 · Partial
- Fix status
- Fixed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat.
Summary
Mozilla Firefox before 42.0 and Firefox ESR 38.x before 38.4 improperly follow the CORS cross-origin request algorithm for the POST method in situations involving an unspecified Content-Type header manipulation, which allows remote attackers to bypass the Same Origin Policy by leveraging the lack of a preflight-request step.
Why it matters now
EPSS 0.02841 86th 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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 9
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mozilla:firefox:38.0:*:*:*:*:*:*:* | 38.0 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:firefox:38.0.1:*:*:*:*:*:*:* | 38.0.1 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:firefox:38.0.5:*:*:*:*:*:*:* | 38.0.5 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:firefox:38.1.0:*:*:*:*:*:*:* | 38.1.0 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:firefox:38.1.1:*:*:*:*:*:*:* | 38.1.1 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:firefox:38.2.0:*:*:*:*:*:*:* | 38.2.0 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:firefox:38.2.1:*:*:*:*:*:*:* | 38.2.1 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:firefox:38.3.0:*:*:*:*:*:*:* | 38.3.0 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* | up to 41.0.2 | Vulnerable | Mozilla |
- 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:38.3.0:*:*:*:*:*:*:* Versions 38.3.0 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions up to 41.0.2 Vulnerable ·Mozilla
Remediation
Red Hat 2 advisories
- RHSA-2015:2519 Released 2015-11-26 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux Client (v. 7) thunderbird-38.4.0-1.el7_2
- Red Hat Enterprise Linux Desktop (v. 5 client) thunderbird-38.4.0-1.el5_11, thunderbird-38.4.0-1.el5_11.i386
- Red Hat Enterprise Linux Desktop (v. 6) thunderbird-38.4.0-1.el6_7
- Red Hat Enterprise Linux Optional Productivity Applications (v. 5 server) thunderbird-38.4.0-1.el5_11, thunderbird-38.4.0-1.el5_11.i386
- Red Hat Enterprise Linux Server Optional (v. 6) thunderbird-38.4.0-1.el6_7
- Red Hat Enterprise Linux Server Optional (v. 7) thunderbird-38.4.0-1.el7_2
- Red Hat Enterprise Linux Workstation (v. 6) thunderbird-38.4.0-1.el6_7
- Red Hat Enterprise Linux Workstation (v. 7) thunderbird-38.4.0-1.el7_2
- RHSA-2015:1982 Released 2015-11-04 · Red Hat rating Criticalfirefox security update
- Red Hat Enterprise Linux (v. 5 server) firefox-38.4.0-1.el5_11, firefox-38.4.0-1.el5_11.i386
- Red Hat Enterprise Linux Client (v. 7) firefox-38.4.0-1.el7_1
- Red Hat Enterprise Linux Client Optional (v. 7) firefox-38.4.0-1.el7_1
- Red Hat Enterprise Linux Desktop (v. 5 client) firefox-38.4.0-1.el5_11, firefox-38.4.0-1.el5_11.i386
- Red Hat Enterprise Linux Desktop (v. 6) firefox-38.4.0-1.el6_7
- Red Hat Enterprise Linux Desktop Optional (v. 6) firefox-38.4.0-1.el6_7
- Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox-38.4.0-1.el6_7
- Red Hat Enterprise Linux Server (v. 6) firefox-38.4.0-1.el6_7
- Red Hat Enterprise Linux Server (v. 7) firefox-38.4.0-1.ael7b_1, firefox-38.4.0-1.el7_1
- Red Hat Enterprise Linux Server Optional (v. 6) firefox-38.4.0-1.el6_7, firefox-38.4.0-1.el6_7.ppc
- Red Hat Enterprise Linux Server Optional (v. 7) firefox-38.4.0-1.el7_1, firefox-38.4.0-1.el7_1.ppc
- Red Hat Enterprise Linux Workstation (v. 6) firefox-38.4.0-1.el6_7
- Red Hat Enterprise Linux Workstation (v. 7) firefox-38.4.0-1.el7_1
- Red Hat Enterprise Linux Workstation Optional (v. 6) firefox-38.4.0-1.el6_7
- Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-38.4.0-1.el7_1
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux (v. 5 server) | Fixed | RHSA-2015:1982 |
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2015:1982, RHSA-2015:2519 |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2015:1982 |
| Red Hat Enterprise Linux Desktop (v. 5 client) | Fixed | RHSA-2015:1982, RHSA-2015:2519 |
| Red Hat Enterprise Linux Desktop (v. 6) | Fixed | RHSA-2015:1982, RHSA-2015:2519 |
| Red Hat Enterprise Linux Desktop Optional (v. 6) | Fixed | RHSA-2015:1982 |
| Red Hat Enterprise Linux HPC Node Optional (v. 6) | Fixed | RHSA-2015:1982 |
| Red Hat Enterprise Linux Optional Productivity Applications (v. 5 server) | Fixed | RHSA-2015:2519 |
| Red Hat Enterprise Linux Server (v. 6) | Fixed | RHSA-2015:1982 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2015:1982 |
| Red Hat Enterprise Linux Server Optional (v. 6) | Fixed | RHSA-2015:1982, RHSA-2015:2519 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2015:1982, RHSA-2015:2519 |
| Red Hat Enterprise Linux Workstation (v. 6) | Fixed | RHSA-2015:1982, RHSA-2015:2519 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2015:1982, RHSA-2015:2519 |
| Red Hat Enterprise Linux Workstation Optional (v. 6) | Fixed | RHSA-2015:1982 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2015:1982 |
Timeline
- 2026-10-02 Threatist record created from CVE-2015-7193
- 2026-10-03 Alias added: GHSA-vj65-jgmv-59m6
References
Advisory 15
More Mozilla Firefox vulnerabilities
- 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
Sources
- CVE-2015-7193 · CVE Program
- CVE-2015-7193 · NVD
- FIRST EPSS
- GHSA-vj65-jgmv-59m6 · GitHub Advisory Database · CC BY 4.0
- CVE-2015-7193 · Red Hat security data · CC BY 4.0
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