CVE-2022-22753

Name: CVE-2022-22753
Creator: NVD / NIST
Published: 2022-12-22T20:15:17.607+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.1/10EPSS 0.63%

Last modified Jun 17, 2026

CVE-2022-22753 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. A Time-of-Check Time-of-Use bug existed in the Maintenance (Updater) Service that could be abused to grant Users write access to an arbitrary directory. This could have been used to escalate to SYSTEM access.<br>*This bug only affects Firefox on Windows. EPSS estimates a 0.63% chance of exploitation in the next 30 days.

Description

A Time-of-Check Time-of-Use bug existed in the Maintenance (Updater) Service that could be abused to grant Users write access to an arbitrary directory. This could have been used to escalate to SYSTEM access.<br>*This bug only affects Firefox on Windows. Other operating systems are unaffected.*. This vulnerability affects Firefox < 97, Thunderbird < 91.6, and Firefox ESR < 91.6.

Metrics

CVSS 3.1

7.1/10

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

EPSS Probability

0.63%

45.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 97.0
Mozilla	Firefox Esr	< 91.6
Mozilla	Thunderbird	< 91.6

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1732435Exploit, Issue Tracking, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-04/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-05/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-06/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1732435Exploit, Issue Tracking, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-04/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-05/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-06/Vendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2022-22753?

How severe is CVE-2022-22753?

CVE-2022-22753 has a CVSS score of 7.1/10 (HIGH severity). The EPSS model estimates a 0.63% probability of exploitation in the next 30 days.

How do I fix CVE-2022-22753?

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-2022-22753?

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

Scan your code now

Source: NVD / NIST