Home/CVE/By crafting a malformed file name for an attachment in a multipart message, an attacker can trick Thunderbird into inclu
CVE

CVE-2025-2830

By crafting a malformed file name for an attachment in a multipart message, an attacker can trick Thunderbird into inclu

By crafting a malformed file name for an attachment in a multipart message, an attacker can trick Thunderbird into including a directory listing of /tmp when the message is forwarded or edited as a new message. This vulnerability could allow attackers to disclose sensitive information from the victim's system. This vulnerability is not limited to Linux.

similar behavior has been observed on Windows as well. This vulnerability was fixed in Thunderbird 137.0.2 and Thunderbird 128.9.2.

MEDIUM · CVSS 6.3 EPSS 0.00099
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
▤

Affected Products & Versions

2
mozilla thunderbird< 128.9.2
mozilla thunderbird>= 129.0 and < 137.0.2
▣

Scoring & Timeline

6.3
MEDIUM · CVSS v3.1 · security@mozilla.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD15 Apr 2025 · 03:16 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

14
usnUSN-7663-1
rhsaRHSA-2025:7507Important
suse-csafSUSE-SU-2025:1366-1
suse-csafopenSUSE-SU-2025:15000-1
rhsaRHSA-2025:4389Low
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://bugzilla.mozilla.org/show_bug.cgi?id=1956379Permissions Required
https://www.mozilla.org/security/advisories/mfsa2025-26/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-27/Vendor Advisory
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