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TI-2018-03700 Aliases CVE-2018-5134GHSA-jfrv-4vgm-cqr5

Information disclosure in Mozilla Firefox

Priority LOW 36CWE-200Published · Updated

Key facts

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

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-200.

Summary

WebExtensions may use "view-source:" URLs to view local "file:" URL content, as well as content stored in "about:cache", bypassing restrictions that only allow WebExtensions to view specific content. This vulnerability affects Firefox < 59.

Why it matters now

EPSS 0.01624 76th percentileScored 2026-11-07
Fix Fixed Firefox (Mozilla): 59

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
MozillaFirefoxbefore 5959Patch availableCNA
  • Firefox VendorMozilla Affected before 59 Fixed in 59 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*before 59.0VulnerableMozilla
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 59.0 Vulnerable ·Mozilla

Remediation

  • Fix · CNA Firefox (Mozilla) Fixed in 59

Fixed in the same release

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

  • Advisory ·

    Mozilla Firefox — USN-3596-1

    17 records Highest priority Priority MEDIUM 6 MEDIUM, 11 LOW

    Other records, highest priority first

    • TI-2018-03693 Memory corruption in Mozilla ThunderbirdPriority MEDIUM 49
    • TI-2018-03694 Use after free in Mozilla FirefoxPriority MEDIUM 46
    • TI-2018-03692 Memory corruption in Mozilla FirefoxPriority MEDIUM 46
    Show all 17 records → Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-5134
  2. 2026-10-03 Alias added: GHSA-jfrv-4vgm-cqr5

References

Advisory 2

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