Description
A specially crafted filename containing a large number of encoded newline characters could obscure the file's extension when displayed in the download dialog. *This bug only affects Thunderbird for Android. Other versions of Thunderbird are unaffected.*. This vulnerability was fixed in Firefox 138 and Thunderbird 138.
Scores
CVSS v3
6.5
EPSS
0.0024
EPSS Percentile
47.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-451
Status
published
Products (4)
mozilla/firefox
< 138.0
Mozilla/Firefox
138
mozilla/thunderbird
< 138.0
Mozilla/Thunderbird
138
Published
Apr 29, 2025
Tracked Since
Feb 18, 2026