TI-2021-10570 Aliases CVE-2021-29953 GHSA-wpmv-r36p-cg3f

Cross-site scripting in Mozilla Firefox

LOW 28CWE-79Published 2021-06-24 · Updated 2024-08-03

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

A malicious webpage could have forced a Firefox for Android user into executing attacker-controlled JavaScript in the context of another domain, resulting in a Universal Cross-Site Scripting vulnerability. *Note: This issue only affected Firefox for Android. Other operating systems are unaffected. Further details are being temporarily withheld to allow users an opportunity to update.*. This vulnerability affects Firefox < 88.0.1 and Firefox for Android < 88.1.3.

Why it matters now

EPSS 0.00647 51st percentileScored 2026-11-07

Fix Fixed Firefox (Mozilla): 88.0.1Firefox for Android (Mozilla): 88.1.3

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 88.0.1	88.0.1	Patch available	CNA
Mozilla	Firefox for Android	before 88.1.3	88.1.3	Patch available	CNA

Firefox VendorMozilla Affected before 88.0.1 Fixed in 88.0.1 Patch available CNA
Firefox for Android VendorMozilla Affected before 88.1.3 Fixed in 88.1.3 Patch available CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:mozilla:firefox::::::-::*	before 88.0.1	Vulnerable	Mozilla
cpe:2.3:a:mozilla:firefox::::::android::*	before 88.1.3	Vulnerable	Mozilla

cpe:2.3:a:mozilla:firefox:*:*:*:*:*:-:*:* Versions before 88.0.1 Vulnerable ·Mozilla
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:android:*:* Versions before 88.1.3 Vulnerable ·Mozilla

Remediation

Fix · CNA Firefox (Mozilla) Fixed in 88.0.1
Fix · CNA Firefox for Android (Mozilla) Fixed in 88.1.3

Fixed in the same release

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

Release · 2021-06-24
Mozilla Firefox, Firefox for Android 88.0.1, 88.1.3
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2021-10569 Race condition in Mozilla FirefoxPriority LOW 34
Show all 2 records →

Vendor assessments

Red Hat

Red Hat rating: Critical. Red Hat's page for this CVE →

Not affected: 3 products

Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8

Timeline

2026-10-02 Threatist record created from CVE-2021-29953
2026-10-03 Alias added: GHSA-wpmv-r36p-cg3f
2026-10-19 EPSS moved to the 50th–90th percentile

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