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TI-2021-10600 Aliases CVE-2021-29983GHSA-9w32-qj8g-f2cw

Firefox for Android could get stuck in fullscreen mode and not exit it even after normal…

Priority LOW 30Published · Updated

Key facts

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

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

Summary

Firefox for Android could get stuck in fullscreen mode and not exit it even after normal interactions that should cause it to exit. *Note: This issue only affected Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox < 91.

Why it matters now

EPSS 0.00735 54th percentileScored 2026-11-07
Fix Fixed Firefox (Mozilla): 91

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
MozillaFirefoxbefore 9191Patch availableCNA
  • Firefox VendorMozilla Affected before 91 Fixed in 91 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*before 91.0VulnerableMozilla
cpe:2.3:o:google:android:-:*:*:*:*:*:*:*not specified by NVDRunning onGoogle
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 91.0 Vulnerable ·Mozilla
  • cpe:2.3:o:google:android:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Google

Remediation

  • Fix · CNA Firefox (Mozilla) Fixed in 91

Fixed in the same release

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

  • Release ·

    Mozilla Firefox 91

    11 records Highest priority Priority MEDIUM 7 MEDIUM, 4 LOW

    Other records, highest priority first

    • TI-2021-10606 Out-of-bounds write in Mozilla ThunderbirdPriority MEDIUM 41
    • TI-2021-10605 Out-of-bounds read in Mozilla ThunderbirdPriority MEDIUM 41
    • TI-2021-10602 Use after free in Mozilla ThunderbirdPriority MEDIUM 41
    Show all 11 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-29983
  2. 2026-10-03 Alias added: GHSA-9w32-qj8g-f2cw

References

Advisory 2

  • 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