6.5

CVE-2023-0430: mozilla thunderbird Improper Certificate Validation

CVSS: 6.5v3.1MediumModified
AliasesRHSA-2023:0600RHSA-2023:0601RHSA-2023:0602
Published 02-06-2023Last modified 10-01-2025
Open JSON

Vulnerability summary

CVE-2023-0430 is a medium (CVSS 6.5) Improper Certificate Validation vulnerability in mozilla thunderbird. EPSS estimates a 0.37% chance of exploitation in the next 30 days, higher than 29.6% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.37%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 6 · Related 3
DLA-3324-1DSA-5355-1MGASA-2023-0034OPENSUSE-SU-2024:12652-1SUSE-SU-2023:0329-1USN-5824-1

Timeline

  1. 02-06-2023
    PublishedVulnerability first disclosed.
  2. 10-01-2025
    Last modifiedVulnerability information updated.

Description

Certificate OCSP revocation status was not checked when verifying S/Mime signatures. Mail signed with a revoked certificate would be displayed as having a valid signature. Thunderbird versions from 68 to 102.7.0 were affected by this bug. This vulnerability affects Thunderbird < 102.7.1.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.37%

Chance of exploitation in the next 30 days

Percentile

30%

Versus all other CVEs

30-day change

0.00 pp

From 0.37% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.37%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Redhat3 products
  • thunderbird< 0:102.7.1-2.el7_9 | < 0:102.7.1-2.el8_1 | < 0:102.7.1-2.el8_2 | < 0:102.7.1-2.el8_4 | < 0:102.7.1-2.el8_6 | < 0:102.7.1-2.el8_7 | < 0:102.7.1-2.el9_0 | < 0:102.7.1-2.el9_1
  • thunderbird-debuginfo< 0:102.7.1-2.el7_9 | < 0:102.7.1-2.el8_1 | < 0:102.7.1-2.el8_2 | < 0:102.7.1-2.el8_4 | < 0:102.7.1-2.el8_6 | < 0:102.7.1-2.el8_7 | < 0:102.7.1-2.el9_0 | < 0:102.7.1-2.el9_1
  • thunderbird-debugsource< 0:102.7.1-2.el8_1 | < 0:102.7.1-2.el8_2 | < 0:102.7.1-2.el8_4 | < 0:102.7.1-2.el8_6 | < 0:102.7.1-2.el8_7 | < 0:102.7.1-2.el9_0 | < 0:102.7.1-2.el9_1
Debian1 product
  • thunderbird< 1:102.7.1+1-1
Mozilla1 product
  • thunderbird≥ unspecified, < 102.7.1 | ≥ 68.0, < 102.7.1
Ubuntu1 product
  • thunderbird< 1:102.7.1+build2-0ubuntu0.18.04.1

4 vendors · 6 products

References

27 links
Show all 27 references