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TI-2017-05455 Aliases CVE-2017-7838GHSA-xg4r-c4j2-fcj4

Improper input validation in Mozilla Firefox

Priority LOW 27CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA.

Summary

Punycode format text will be displayed for entire qualified international domain names in some instances when a sub-domain triggers the punycode display instead of the primary domain being displayed in native script and the sub-domain only displaying as punycode. This could be used for limited spoofing attacks due to user confusion. This vulnerability affects Firefox < 57.

Why it matters now

EPSS 0.01441 73rd percentileScored 2026-11-07
Fix Fixed Firefox (Mozilla): 57

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
MozillaFirefoxbefore 5757Patch availableCNA
  • Firefox VendorMozilla Affected before 57 Fixed in 57 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*up to 56.0.2VulnerableMozilla
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions up to 56.0.2 Vulnerable ·Mozilla

Remediation

  • Fix · CNA Firefox (Mozilla) Fixed in 57

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Mozilla Firefox 57

    12 records Highest priority Priority MEDIUM 1 MEDIUM, 11 LOW

    Other records, highest priority first

    • TI-2017-05444 Memory corruption in Mozilla FirefoxPriority MEDIUM 47
    • TI-2017-05452 Mixed content blocking of insecure (HTTP) sub-resources in a secure (HTTPS) document was…Priority LOW 35
    • TI-2017-05453 Uncontrolled search path in Mozilla FirefoxPriority LOW 34
    Show all 12 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2017-7838
  2. 2026-10-03 Alias added: GHSA-xg4r-c4j2-fcj4

References

Advisory 1

Other 1

  • 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