- Description
- A crafted HTML email using mailbox:/// links can trigger automatic, unsolicited downloads of .pdf files to the user's desktop or home directory without prompting, even if auto-saving is disabled. This behavior can be abused to fill the disk with garbage data (e.g. using /dev/urandom on Linux) or to leak Windows credentials via SMB links when the email is viewed in HTML mode. While user interaction is required to download the .pdf file, visual obfuscation can conceal the download trigger. Viewing the email in HTML mode is enough to load external content. This vulnerability affects Thunderbird < 128.11.1 and Thunderbird < 139.0.2.
- Source
- security@mozilla.org
- NVD status
- Modified
- Products
- thunderbird
CVSS 3.1
- Type
- Secondary
- Base score
- 6.5
- Impact score
- 3.6
- Exploitability score
- 2.8
- Vector string
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- Severity
- MEDIUM
- 134c704f-9b21-4f2e-91b3-4a467353bcc0
- CWE-451
- Hype score
- Not currently trending
📢 URGENT: @SlackwareLinux users—patch Thunderbird NOW to fix CVE-2025-5986 (RCE risk). Hashes & steps: Read more: 👉 https://t.co/SXYP71Z2d2 #InfoSec #Linux #OpenSource https://t.co/A5ar6pu90y
@Cezar_H_Linux
12 Jun 2025
14 Impressions
0 Retweets
1 Like
0 Bookmarks
0 Replies
0 Quotes
CVE-2025-5986 A crafted HTML email using mailbox:/// links can trigger automatic, unsolicited downloads of .pdf files to the user's desktop or home directory without prompting, even … https://t.co/71R3jamO7L
@CVEnew
11 Jun 2025
233 Impressions
0 Retweets
1 Like
0 Bookmarks
0 Replies
0 Quotes
CVE-2025-5986 Thunderbird HTML Email Link Vulnerability Leads to Unsolicited PDF Downloads https://t.co/OX06VA2PQa
@VulmonFeeds
11 Jun 2025
13 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
Ciekawa podatność w Thunderbirdzie. Można komuś podrzucić 'syfa' na komputer - w zasadzie bez żadnej interakcji ofiary (wystarczy otworzyć e-maila): CVE-2025-5986: A crafted HTML email using mailbox:/// links can trigger automatic, unsolicited downloads of .pdf files to t
@Sekurak
11 Jun 2025
5382 Impressions
9 Retweets
71 Likes
12 Bookmarks
1 Reply
0 Quotes
[
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*",
"matchCriteriaId": "02A11E50-4C28-475B-B957-B79BD0654056",
"versionEndExcluding": "128.11.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*",
"matchCriteriaId": "83C7414D-BCC3-4887-88B9-06E2F62FD328",
"versionEndExcluding": "139.0.2",
"versionStartIncluding": "135.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
]