5.4

CVE-2022-1197: mozilla thunderbird Improper Certificate Validation

Modified
AliasesUBUNTU-CVE-2022-1197DEBIAN-CVE-2022-1197ALPINE-CVE-2022-1197
Published 22-12-2022Last modified 16-04-2025

Vulnerability summary

CVE-2022-1197 is a medium (CVSS 5.4) Improper Certificate Validation vulnerability in mozilla thunderbird. EPSS estimates a 0.40% chance of exploitation in the next 30 days, higher than 34% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.4, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.4/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.40%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 10 · Related 2
DLA-2978-1DSA-5118-1MGASA-2022-0157RHSA-2022:1301RHSA-2022:1302RHSA-2022:1303

Timeline

  1. 22-12-2022
    PublishedVulnerability first disclosed.
  2. 16-04-2025
    Last modifiedVulnerability information updated.

Description

When importing a revoked key that specified key compromise as the revocation reason, Thunderbird did not update the existing copy of the key that was not yet revoked, and the existing key was kept as non-revoked. Revocation statements that used another revocation reason, or that didn't specify a revocation reason, were unaffected. This vulnerability affects Thunderbird < 91.8.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.40%

Chance of exploitation in the next 30 days

Percentile

34%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.38% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.

Alpine1 product
  • thunderbird< 91.8.0-r0
Debian1 product
  • thunderbird< 1:91.8.0-1
Mozilla1 product
Ubuntu1 product
  • thunderbird< 1:91.8.1+build1-0ubuntu0.18.04.1 | < 1:91.8.1+build1-0ubuntu0.20.04.1

4 vendors · 4 products

References

8 links