Is CVE-2022-45420 in the CISA KEV catalog?

No. CVE-2022-45420 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-45420?

CVE-2022-45420 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2022-45420?

CVE-2022-45420 has an EPSS score of 0.57% (43th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-45420?

Upgrade firefox on debian unstable to 107.0-1 or later. Fixes are available for 7 affected products.

CVE & CISA-KEV Catalog

CVE-2022-45420

MEDIUM

6.5

CVSS v3

NVD

Description

Use tables inside of an iframe, an attacker could have caused iframe contents to be rendered outside the boundaries of the iframe, resulting in potential user confusion or spoofing attacks. This vulnerability affects Firefox ESR < 102.5, Thunderbird < 102.5, and Firefox < 107.

CWE-1021

How to fix

Remediation Available

firefoxDebian

Fixed in:107.0-1CVE-2022-45420

firefoxUbuntu

Fixed in:107.0+build2-0ubuntu0.18.04.1USN-5726-1

Fixed in:107.0+build2-0ubuntu0.20.04.1USN-5726-1

thunderbirdUbuntu

Fixed in:1:102.7.1+build2-0ubuntu0.18.04.1USN-5824-1

Fixed in:1:102.7.1+build2-0ubuntu0.20.04.1USN-5824-1

Fixed in:1:102.7.1+build2-0ubuntu0.22.04.1USN-5824-1

Fixed in:1:102.7.1+build2-0ubuntu0.22.10.1USN-5824-1

DeveloperEditionWindows application

Affected:107.0Fixed in:107.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:107.0Fixed in:107.0Mozilla

Mozilla Firefox ESR (en-US)Windows application

Affected:102.5Fixed in:102.5Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:102.5Fixed in:102.5Mozilla

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

0.57%probability of exploitation in 30 days

43rdpercentile

Moderate risk: more likely to be exploited than 43% of all known CVEs.

References

Vendor Advisory4

Related Vulnerabilities

Other CWE-1021 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2021-21132	Critical	9.6	23%	-	Fix
CVE-2011-1244	Medium	5.8	15%	-	-
CVE-2013-2682	Medium	4.3	6.3%	-	-
CVE-2021-21139	Medium	6.5	4.7%	-	Fix
CVE-2017-11290	Medium	6.1	3.0%	-	-
CVE-2008-2716	Medium	5.0	3.0%	-	Fix

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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 2025-04-15.