Is CVE-2022-1802 in the CISA KEV catalog?

No. CVE-2022-1802 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-1802?

CVE-2022-1802 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2022-1802?

CVE-2022-1802 has an EPSS score of 26.71% (98th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2022-1802

HIGHEPSS 98th pctl

8.8

CVSS v3

NVD

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.

CWE-1321

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

26.71%probability of exploitation in 30 days

98thpercentile

Very high risk: more likely to be exploited than 98% of all known CVEs.

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-04-16.