Improper input validation in Mozilla Firefox
Priority LOW 37CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat.
Summary
When entered directly, Reader Mode did not strip the username and password section of URLs displayed in the addressbar. This can be used for spoofing the domain of the current page. This vulnerability affects Firefox < 54.
Why it matters now
EPSS 0.01881 79th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Firefox (Mozilla): 54Red 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 |
|---|---|---|---|---|---|
| Mozilla | Firefox | before 54 | 54 | Patch available | CNA |
- Firefox VendorMozilla Affected before 54 Fixed in 54 Patch available CNA
CPE configurations NVD · 7
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:* | 6.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:* | 6.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:* | 6.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* | before 54.0 | Vulnerable | Mozilla |
- cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 54.0 Vulnerable ·Mozilla
Remediation
- Fix · CNA Firefox (Mozilla) Fixed in 54
Red Hat 2 advisories
- RHSA-2018:2112 Released 2018-06-28 · Red Hat rating Criticalfirefox security update
- Red Hat Enterprise Linux Desktop (v. 6) firefox-60.1.0-5.el6
- Red Hat Enterprise Linux Desktop Optional (v. 6) firefox-60.1.0-5.el6
- Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox-60.1.0-5.el6
- Red Hat Enterprise Linux Server (v. 6) firefox-60.1.0-5.el6
- Red Hat Enterprise Linux Server Optional (v. 6) firefox-60.1.0-5.el6
- Red Hat Enterprise Linux Workstation (v. 6) firefox-60.1.0-5.el6
- Red Hat Enterprise Linux Workstation Optional (v. 6) firefox-60.1.0-5.el6
- RHSA-2018:2113 Released 2018-06-28 · Red Hat rating Criticalfirefox security update
- Red Hat Enterprise Linux Client (v. 7) firefox-60.1.0-4.el7_5
- Red Hat Enterprise Linux Client Optional (v. 7) firefox-60.1.0-4.el7_5
- Red Hat Enterprise Linux Server (v. 7) firefox-60.1.0-4.el7_5
- Red Hat Enterprise Linux Server Optional (v. 7) firefox-60.1.0-4.el7_5
- Red Hat Enterprise Linux Workstation (v. 7) firefox-60.1.0-4.el7_5
- Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-60.1.0-4.el7_5
- Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) firefox-60.1.0-4.el7_5
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
Mozilla Firefox 54
12 records Highest priority Priority MEDIUM 1 MEDIUM, 11 LOW
Other records, highest priority first
- TI-2017-03494 Memory corruption in Mozilla FirefoxPriority MEDIUM 46
- TI-2017-05375 Untrusted search path in Mozilla FirefoxPriority LOW 37
- TI-2017-05385 Improper input validation in Mozilla FirefoxPriority LOW 36
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2018:2113 |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2018:2113 |
| Red Hat Enterprise Linux Desktop (v. 6) | Fixed | RHSA-2018:2112 |
| Red Hat Enterprise Linux Desktop Optional (v. 6) | Fixed | RHSA-2018:2112 |
| Red Hat Enterprise Linux HPC Node Optional (v. 6) | Fixed | RHSA-2018:2112 |
| Red Hat Enterprise Linux Server (v. 6) | Fixed | RHSA-2018:2112 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2018:2113 |
| Red Hat Enterprise Linux Server Optional (v. 6) | Fixed | RHSA-2018:2112 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2018:2113 |
| Red Hat Enterprise Linux Workstation (v. 6) | Fixed | RHSA-2018:2112 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2018:2113 |
| Red Hat Enterprise Linux Workstation Optional (v. 6) | Fixed | RHSA-2018:2112 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2018:2113 |
| Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) | Fixed | RHSA-2018:2113 |
Not affected: 3 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
Timeline
- 2026-10-02 Threatist record created from CVE-2017-7762
- 2026-10-03 Alias added: GHSA-7g8j-7wv5-6f7h
References
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-2017-7762 · CVE Program
- CVE-2017-7762 · NVD
- FIRST EPSS
- GHSA-7g8j-7wv5-6f7h · GitHub Advisory Database · CC BY 4.0
- CVE-2017-7762 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences