CVE-2022-1802

Name: CVE-2022-1802
Creator: NVD / NIST
Published: 2022-12-22T20:15:13.427+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 26.71%

Last modified Jun 17, 2026

CVE-2022-1802 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. If an attacker was able to corrupt the methods of an Array object in JavaScript via prototype pollution, they could have achieved execution of attacker-controlled JavaScript code in a privileged context. This vulnerability affects Firefox ESR < 91.9.1, Firefox < 100.0.2, Firefox for Android < 100.3.0, and Thunderbird < 91.9.1.. EPSS estimates a 26.71% chance of exploitation in the next 30 days.

Description

If an attacker was able to corrupt the methods of an Array object in JavaScript via prototype pollution, they could have achieved execution of attacker-controlled JavaScript code in a privileged context. This vulnerability affects Firefox ESR < 91.9.1, Firefox < 100.0.2, Firefox for Android < 100.3.0, and Thunderbird < 91.9.1.

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

26.71%

97.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 100.0.2
Mozilla	Firefox Esr	< 91.9.1
Mozilla	Thunderbird	< 91.9.1
Mozilla	Firefox	< 100.3.0

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1770137Issue Tracking, Permissions Required, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-19/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1770137Issue Tracking, Permissions Required, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-19/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1770137Issue Tracking, Permissions Required, Vendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2022-1802?

How severe is CVE-2022-1802?

CVE-2022-1802 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 26.71% probability of exploitation in the next 30 days.

How do I fix CVE-2022-1802?

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-2022-1802?

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

Scan your code now

Source: NVD / NIST