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Vulnerability record · CVE-2022-2200 · published 22 December 2022

CVE-2022-2200: Mozilla firefox prototype pollution vulnerability

Mozilla · Firefox

If an object prototype was corrupted by an attacker, they would have been able to set undesired attributes on a JavaScript object, leading to privileged code execution. This vulnerability affects Firefox < 102, Firefox ESR < 91.11, Thunderbird < 102, and Thunderbird < 91.11.

8.8 CVSS 3.1 High EPSS 24% · top 2.2% CWE-1321 · Prototype pollution
8.8CVSS 3.1 base score
24%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

If an object prototype was corrupted by an attacker, they would have been able to set undesired attributes on a JavaScript object, leading to privileged code execution. This vulnerability affects Firefox < 102, Firefox ESR < 91.11, Thunderbird < 102, and Thunderbird < 91.11.

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

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugzilla.mozilla.org/show_bug.cgi?id=1771381 Issue TrackingPermissions RequiredVendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-24/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-25/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-26/ Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1771381 Issue TrackingPermissions RequiredVendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-24/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-25/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-26/ Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2022-2200), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.