CVE-2020-35112
HIGHFirefox <84, Thunderbird <78.6, Firefox ESR <78.6 - Path Traversal
Title source: llmDescription
If a user downloaded a file lacking an extension on Windows, and then "Open"-ed it from the downloads panel, if there was an executable file in the downloads directory with the same name but with an executable extension (such as .bat or .exe) that executable would have been launched instead. *Note: This issue only affected Windows operating systems. Other operating systems are unaffected.*. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.
References (4)
Core 4
Core References
Vendor Advisory x_refsource_misc
https://www.mozilla.org/security/advisories/mfsa2020-54/
Vendor Advisory x_refsource_misc
https://www.mozilla.org/security/advisories/mfsa2020-56/
Vendor Advisory x_refsource_misc
https://www.mozilla.org/security/advisories/mfsa2020-55/
Permissions Required x_refsource_misc
https://bugzilla.mozilla.org/show_bug.cgi?id=1661365
Scores
CVSS v3
8.8
EPSS
0.0053
EPSS Percentile
67.5%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Details
Status
published
Products (3)
mozilla/firefox
< 84.0
mozilla/firefox_esr
< 78.6.0
mozilla/thunderbird
< 78.6.0
Published
Jan 07, 2021
Tracked Since
Feb 18, 2026