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TI-2018-03701 Aliases CVE-2018-5135GHSA-q9w5-hr49-h5h8

Missing authorization in Mozilla Firefox

Priority LOW 36CWE-862Published · Updated

Key facts

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

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-862.

Summary

WebExtensions can bypass normal restrictions in some circumstances and use "browser.tabs.executeScript" to inject scripts into contexts where this should not be allowed, such as pages from other WebExtensions or unprivileged "about:" pages. This vulnerability affects Firefox < 59.

Why it matters now

EPSS 0.01497 74th 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-2018-5135
  2. 2026-10-03 Alias added: GHSA-q9w5-hr49-h5h8

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