What’s Vulnerable › Vulnerabilities

CVE-2022-2200

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 23.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-12-22 · updated 2026-06-17
• Weakness: CWE-1321

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.

Affected products

• Mozilla Firefox: before 102.0 — fixed in 102.0
• Mozilla Firefox ESR: before 91.11 — fixed in 91.11
• Mozilla Thunderbird: before 91.11 — fixed in 91.11

How to fix

Upgrade to a fixed version: Mozilla Firefox 102.0; Mozilla Firefox ESR 91.11; Mozilla Thunderbird 91.11. Check the vendor advisory for mitigations.

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=1771381
• https://www.mozilla.org/security/advisories/mfsa2022-24/
• https://www.mozilla.org/security/advisories/mfsa2022-25/
• https://www.mozilla.org/security/advisories/mfsa2022-26/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1771381
• https://www.mozilla.org/security/advisories/mfsa2022-24/
• https://www.mozilla.org/security/advisories/mfsa2022-25/
• https://www.mozilla.org/security/advisories/mfsa2022-26/

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