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TI-2023-06276 Aliases CVE-2023-6871GHSA-43mg-g32w-94qf

Under certain conditions, Firefox did not display a warning when a user attempted to…

Priority LOW 21Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

Under certain conditions, Firefox did not display a warning when a user attempted to navigate to a new protocol handler. This vulnerability affects Firefox < 121.

Why it matters now

EPSS 0.00493 42nd percentileScored 2026-11-07
Fix Fixed Firefox (Mozilla): 121

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
MozillaFirefoxbefore 121121Patch availableCNA
  • Firefox VendorMozilla Affected before 121 Fixed in 121 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*before 121.0VulnerableMozilla
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 121.0 Vulnerable ·Mozilla

Remediation

  • Fix · CNA Firefox (Mozilla) Fixed in 121

Fixed in the same release

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

  • Release ·

    Mozilla Firefox 121

    18 records Highest priority Priority MEDIUM 8 MEDIUM, 10 LOW

    Other records, highest priority first

    • TI-2023-06261 Out-of-bounds write in Mozilla Firefox ESRPriority MEDIUM 57
    • TI-2023-06263 Out-of-bounds write in Mozilla Firefox ESRPriority MEDIUM 43
    • TI-2023-06271 Improper handling of exceptional conditions in Mozilla FirefoxPriority MEDIUM 41
    Show all 18 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-6871
  2. 2026-10-03 Alias added: GHSA-43mg-g32w-94qf

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