Is CVE-2022-31739 in the CISA KEV catalog?

No. CVE-2022-31739 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-31739?

CVE-2022-31739 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2022-31739?

CVE-2022-31739 has an EPSS score of 0.66% (47th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-31739?

Upgrade DeveloperEdition to 101 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2022-31739

HIGH

8.8

CVSS v3

NVD

Description

When downloading files on Windows, the % character was not escaped, which could have lead to a download incorrectly being saved to attacker-influenced paths that used variables such as %HOMEPATH% or %APPDATA%. *This bug only affects Firefox for Windows. Other operating systems are unaffected.*. This vulnerability affects Thunderbird < 91.10, Firefox < 101, and Firefox ESR < 91.10.

CWE-73External Control of File Name or Path

How to fix

Remediation Available

DeveloperEditionWindows application

Affected:101Fixed in:101Mozilla

Mozilla Firefox (en-US)Windows application

Affected:101Fixed in:101Mozilla

Mozilla Firefox ESR (en-US)Windows application

Affected:91.10Fixed in:91.10Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:91.10Fixed in:91.10Mozilla

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

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.66%probability of exploitation in 30 days

47thpercentile

Moderate risk: more likely to be exploited than 47% of all known CVEs.

References

Vendor Advisory4

Related Vulnerabilities

Other CWE-73 (External Control of File Name or Path) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2022-39952	Critical	9.8	100%	-	Fix
CVE-2024-8517	Critical	9.8	95%	-	Fix
CVE-2023-4634	Critical	9.8	83%	-	Fix
CVE-2018-17246	Critical	9.8	82%	-	Fix
CVE-2024-43451	Medium	6.5	82%	KEV	Fix
CVE-2025-33053	High	8.8	82%	KEV	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 2025-04-16.