Is CVE-2023-0547 in the CISA KEV catalog?

No. CVE-2023-0547 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-0547?

CVE-2023-0547 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2023-0547?

CVE-2023-0547 has an EPSS score of 0.37% (29th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-0547?

Upgrade thunderbird on debian 11 to 1:102.10.0-1~deb11u1 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2023-0547

MEDIUM

6.5

CVSS v3

NVD

Description

OCSP revocation status of recipient certificates was not checked when sending S/Mime encrypted email, and revoked certificates would be accepted. Thunderbird versions from 68 to 102.9.1 were affected by this bug. This vulnerability affects Thunderbird < 102.10.

CWE-295Improper Certificate Validation

How to fix

Remediation Available

thunderbirdDebian

Fixed in:1:102.10.0-1~deb11u1CVE-2023-0547

Fixed in:1:102.10.0-1CVE-2023-0547

thunderbirdUbuntu

Fixed in:1:102.10.0+build2-0ubuntu0.18.04.1USN-6015-1

Fixed in:1:102.10.0+build2-0ubuntu0.20.04.1USN-6015-1

Fixed in:1:102.10.0+build2-0ubuntu0.22.04.1USN-6015-1

Fixed in:1:102.10.0+build2-0ubuntu0.22.10.1USN-6015-1

Mozilla Thunderbird (en-US)Windows application

Affected:68.0 102.10Fixed in:102.10Mozilla

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

ConfidentialityNone

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

0.37%probability of exploitation in 30 days

29thpercentile

Low risk: more likely to be exploited than 29% of all known CVEs.

References

Vendor Advisory2

Related Vulnerabilities

Other CWE-295 (Improper Certificate Validation) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2015-4000	Low	3.7	100%	-	Fix
CVE-2020-0601	High	8.1	89%	KEV	Fix
CVE-2009-3555	Critical	9.8	87%	-	Fix
CVE-2022-26923	High	8.8	83%	KEV	Fix
CVE-2023-27823	Critical	9.8	53%	-	-
CVE-2022-42979	High	8.8	24%	-	-

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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 2025-01-10.