CVE-2022-28281

Name: CVE-2022-28281
Creator: NVD / NIST
Published: 2022-12-22T20:15:23.023+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 2.56%

Last modified Jun 17, 2026

CVE-2022-28281 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. If a compromised content process sent an unexpected number of WebAuthN Extensions in a Register command to the parent process, an out of bounds write would have occurred leading to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 91.8, Firefox < 99, and Firefox ESR < 91.8.. EPSS estimates a 2.56% chance of exploitation in the next 30 days.

Description

If a compromised content process sent an unexpected number of WebAuthN Extensions in a Register command to the parent process, an out of bounds write would have occurred leading to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 91.8, Firefox < 99, and Firefox ESR < 91.8.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

2.56%

83.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 99.0
Mozilla	Firefox Esr	< 91.8
Mozilla	Thunderbird	< 91.8

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1755621Exploit, Issue Tracking, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-13/Exploit, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-14/Exploit, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-15/Exploit, Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1755621Exploit, Issue Tracking, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-13/Exploit, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-14/Exploit, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-15/Exploit, Vendor Advisory

Timeline

Published: Dec 22, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-28281?

How severe is CVE-2022-28281?

CVE-2022-28281 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 2.56% probability of exploitation in the next 30 days.

How do I fix CVE-2022-28281?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-28281?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST