Is CVE-2022-31743 in the CISA KEV catalog?

No. CVE-2022-31743 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-31743?

CVE-2022-31743 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2022-31743?

CVE-2022-31743 has an EPSS score of 0.43% (34th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-31743?

Upgrade firefox on debian unstable to 101.0-1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2022-31743

MEDIUM

6.5

CVSS v3

NVD

Description

Firefox's HTML parser did not correctly interpret HTML comment tags, resulting in an incongruity with other browsers. This could have been used to escape HTML comments on pages that put user-controlled data in them. This vulnerability affects Firefox < 101.

CWE-79Cross-Site Scripting (XSS)

How to fix

Remediation Available

firefoxDebian

Fixed in:101.0-1CVE-2022-31743

firefoxUbuntu

Fixed in:101.0.1+build1-0ubuntu0.18.04.1USN-5475-1

Fixed in:101.0.1+build1-0ubuntu0.20.04.1USN-5475-1

DeveloperEditionWindows application

Affected:101.0Fixed in:101.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:101.0Fixed in:101.0Mozilla

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

0.43%probability of exploitation in 30 days

34thpercentile

Low risk: more likely to be exploited than 34% of all known CVEs.

References

Vendor Advisory2

Related Vulnerabilities

Other CWE-79 (Cross-Site Scripting (XSS)) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-11022	Medium	6.9	99%	-	Fix
CVE-2019-3929	Critical	9.8	99%	KEV	Fix
CVE-2020-9496	Medium	6.1	99%	-	-
CVE-2023-28341	Medium	6.1	99%	-	Fix
CVE-2018-12998	Medium	6.1	98%	-	-
CVE-2025-4123	High	7.6	98%	-	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.