7.5

CVE-2021-29950: mozilla thunderbird

CVSS: 7.5v3.1HighModified
AliasesUBUNTU-CVE-2021-29950DEBIAN-CVE-2021-29950
Published 24-06-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-29950 is a high (CVSS 7.5) vulnerability in mozilla thunderbird. EPSS estimates a 0.85% chance of exploitation in the next 30 days, higher than 57.6% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
40/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
0.85%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 9 · Related 3
DLA-2609-1DSA-4876-1OPENSUSE-SU-2021:1854-1RHSA-2021:1190RHSA-2021:1192RHSA-2021:1193

Timeline

  1. 24-06-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

Thunderbird unprotects a secret OpenPGP key prior to using it for a decryption, signing or key import task. If the task runs into a failure, the secret key may remain in memory in its unprotected state. This vulnerability affects Thunderbird < 78.8.1.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.85%

Chance of exploitation in the next 30 days

Percentile

58%

Versus all other CVEs

30-day change

0.00 pp

From 0.85% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.85%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (bugzilla.mozilla.org)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • thunderbird< 1:78.9.0-1
Mozilla1 product
Ubuntu1 product
  • thunderbird< 1:78.8.1+build1-0ubuntu0.18.04.1 | < 1:78.8.1+build1-0ubuntu0.20.04.1

3 vendors · 3 products

References

8 links