Is CVE-2021-38505 in the CISA KEV catalog?

No. CVE-2021-38505 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-38505?

CVE-2021-38505 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2021-38505?

CVE-2021-38505 has an EPSS score of 1.05% (60th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-38505?

Upgrade DeveloperEdition to 94.0 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2021-38505

MEDIUM

6.5

CVSS v3

NVD

Description

Microsoft introduced a new feature in Windows 10 known as Cloud Clipboard which, if enabled, will record data copied to the clipboard to the cloud, and make it available on other computers in certain scenarios. Applications that wish to prevent copied data from being recorded in Cloud History must use specific clipboard formats; and Firefox before versions 94 and ESR 91.3 did not implement them. This could have caused sensitive data to be recorded to a user's Microsoft account. *This bug only affects Firefox for Windows 10+ with Cloud Clipboard enabled. Other operating systems are unaffected.*. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.

CWE-668

How to fix

Remediation Available

DeveloperEditionWindows application

Affected:94.0Fixed in:94.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:94.0Fixed in:94.0Mozilla

Mozilla Firefox ESR (en-US)Windows application

Affected:91.3.0Fixed in:91.3.0Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:91.3.0Fixed in:91.3.0Mozilla

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

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

1.05%probability of exploitation in 30 days

60thpercentile

Moderate risk: more likely to be exploited than 60% of all known CVEs.

References

Vendor Advisory4

Related Vulnerabilities

Other CWE-668 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2022-39952	Critical	9.8	100%	-	Fix
CVE-2017-16597	Critical	9.8	57%	-	-
CVE-2017-16603	High	8.8	54%	-	-
CVE-2024-25153	Critical	9.8	42%	-	Fix
CVE-2017-0215	Medium	5.3	36%	-	-
CVE-2022-25236	Critical	9.8	34%	-	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.