Improper Privilege Management Affecting thunderbird package, versions <1:78.10.0-1


Severity

Recommended
0.0
high
0
10

Snyk's Security Team recommends NVD's CVSS assessment. Learn more

Threat Intelligence

EPSS
1.28% (67th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-ECHOLATEST-THUNDERBIRD-18319189
  • published26 Jul 2026
  • disclosed24 Jun 2021

Introduced: 24 Jun 2021

CVE-2021-23999  (opens in a new tab)
CWE-269  (opens in a new tab)
CWE-697  (opens in a new tab)

How to fix?

Upgrade Echo:latest thunderbird to version 1:78.10.0-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream thunderbird package and not the thunderbird package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

If a Blob URL was loaded through some unusual user interaction, it could have been loaded by the System Principal and granted additional privileges that should not be granted to web content. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.

CVSS Base Scores

version 3.1