No exploitation reportedFix available

CVE-2022-2200

Q: Is CVE-2022-2200 actively exploited?

Active exploitation of CVE-2022-2200 has not been confirmed. Its EPSS score was 23.9% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2022-2200?

CVE-2022-2200 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2022-12-22
Fixed in102.0
WeaknessCWE-1321

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2022-12-2220:15CVE publishedNVD
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2022-2200?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2022-2200?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Mozilla firefox

Branch	Affected	Fixed in	Source
102.0	< 102.0	102.0	NVD

Mozilla firefox esr

Branch	Affected	Fixed in	Source
91.11	< 91.11	91.11	NVD

Mozilla thunderbird

Branch	Affected	Fixed in	Source
91.11	< 91.11	91.11	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Mozilla firefox to 102.0

Advisories and patches

bugzilla.mozilla.orgVendor Advisory
www.mozilla.orgVendor Advisory
www.mozilla.orgVendor Advisory
www.mozilla.orgVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2025-04-15
OpenCVESSVC decisionnone—
CISA-ADPCVSS 3.18.82025-04-15
NVDCVSS 3.18.8read 2026-10-23
CISA-ADPweakness (CWE)CWE-13212025-04-15
NVDweakness (CWE)CWE-1321read 2026-10-23
FIRST EPSSEPSS score23.9 %read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published: 2022-12-22
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2022-2200?

Is CVE-2022-2200 actively exploited?

Active exploitation of CVE-2022-2200 has not been confirmed. Its EPSS score was 23.9% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2022-2200?

CVE-2022-2200 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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