Is CVE-2019-9801 in the CISA KEV catalog?

No. CVE-2019-9801 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2019-9801?

CVE-2019-9801 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2019-9801?

CVE-2019-9801 has an EPSS score of 1.31% (67th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2019-9801?

Upgrade DeveloperEdition to 66.0 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2019-9801

MEDIUM

5.3

CVSS v3

NVD

Description

Firefox will accept any registered Program ID as an external protocol handler and offer to launch this local application when given a matching URL on Windows operating systems. This should only happen if the program has specifically registered itself as a "URL Handler" in the Windows registry. *Note: This issue only affects Windows operating systems. Other operating systems are unaffected.*. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.

CWE-20Improper Input Validation

How to fix

Remediation Available

DeveloperEditionWindows application

Affected:66.0Fixed in:66.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:66.0Fixed in:66.0Mozilla

Mozilla Firefox ESR (en-US)Windows application

Affected:60.6Fixed in:60.6Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:60.6Fixed in:60.6Mozilla

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 InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityLow

AvailabilityNone

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Exploit Intelligence

1.31%probability of exploitation in 30 days

67thpercentile

Moderate risk: more likely to be exploited than 67% of all known CVEs.

References

Vendor Advisory4

Related Vulnerabilities

Other CWE-20 (Improper Input Validation) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-3400	Critical	10.0	100%	KEV + Ransom	-
CVE-2021-45105	Medium	5.9	100%	-	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2021-21985	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2018-7600	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2020-3452	High	7.5	100%	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 2024-11-21.