TI-2021-19434 Aliases CVE-2021-43544 GHSA-7w2r-8gq9-28xx

Cross-site scripting in Mozilla Firefox

LOW 28CWE-79Published 2021-12-08 · Updated 2024-08-04

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: Low · Low · None
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.

Summary

When receiving a URL through a SEND intent, Firefox would have searched for the text, but subsequent usages of the address bar might have caused the URL to load unintentionally, which could lead to XSS and spoofing attacks. *This bug only affects Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox < 95.

Why it matters now

EPSS 0.00526 44th percentileScored 2026-11-07

Fix Fixed Firefox (Mozilla): 95

SSVC decision points

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

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Mozilla	Firefox	before 95	95	Patch available	CNA

Firefox VendorMozilla Affected before 95 Fixed in 95 Patch available CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:mozilla:firefox::::::::	before 95.0	Vulnerable	Mozilla
cpe:2.3:o:google:android:-:::::::*	not specified by NVD	Running on	Google

cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 95.0 Vulnerable ·Mozilla
cpe:2.3:o:google:android:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Google

Remediation

Fix · CNA Firefox (Mozilla) Fixed in 95

Fixed in the same release

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

Release · 2021-12-08
Mozilla Firefox 95
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2021-19430 WebExtensions with the correct permissions were able to create and install ServiceWorkers…Priority LOW 31
Show all 2 records →

Timeline

2026-10-02 Threatist record created from CVE-2021-43544
2026-10-03 Alias added: GHSA-7w2r-8gq9-28xx

References

Advisory 1

https://www.mozilla.org/security/advisories/mfsa2021-52/

Other 1

https://bugzilla.mozilla.org/show_bug.cgi?id=1739934

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