CVE-2025-3932
published 2025-05-14CVE-2025-3932: It was possible to craft an email that showed a tracking link as an attachment. If the user attempted to open the attachment, Thunderbird automatically…
PriorityP433medium6.5CVSS 3.1
AVNACLPRNUIRSUCHINAN
EPSS
0.33%
24.8th percentile
It was possible to craft an email that showed a tracking link as an attachment. If the user attempted to open the attachment, Thunderbird automatically accessed the link. The configuration to block remote content did not prevent that. Thunderbird has been fixed to no longer allow access to web pages listed in the X-Mozilla-External-Attachment-URL header of an email. This vulnerability was fixed in Thunderbird 128.10.1 and Thunderbird 138.0.1.
Affected
8 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | thunderbird | < thunderbird 1:128.10.1esr-1~deb12u1 (bookworm) | thunderbird 1:128.10.1esr-1~deb12u1 (bookworm) |
| mozilla | firefox | — | — |
| mozilla | thunderbird | < 128.10.1 | 128.10.1 |
| mozilla | thunderbird | >= 0 < 1:128.10.1esr-1~deb11u1 | 1:128.10.1esr-1~deb11u1 |
| mozilla | thunderbird | >= 0 < 1:128.10.1esr-1~deb12u1 | 1:128.10.1esr-1~deb12u1 |
| mozilla | thunderbird | >= 0 < 1:128.10.1esr-1 | 1:128.10.1esr-1 |
| mozilla | thunderbird | >= 0 < 1:128.10.1esr-1 | 1:128.10.1esr-1 |
| mozilla | thunderbird | >= 129.0 < 138.0.1 | 138.0.1 |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
osv6.5MEDIUM
vendor_debian6.5MEDIUM
vendor_redhat6.5MEDIUM
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Ubuntu
Thunderbird vulnerabilities
vendor_ubuntu·2025-07-22
CVE-2025-4083 Thunderbird vulnerabilities
Title: Thunderbird vulnerabilities
Summary: Several security issues were fixed in Thunderbird.
Multiple security issues were discovered in Thunderbird. If a user were
tricked into opening a specially crafted website in a browsing context, an
attacker could potentially exploit these to cause a denial of service,
obtain sensitive information, bypass security restrictions, cross-site
tracing, or execute arbitrary code.
Instructions: This update uses a new upstream release, which includes additional bug
fixes. After a standard system update you need to restart thunderbird to
make all the necessary changes.
Red Hat
thunderbird: Tracking Links in Attachments Bypassed Remote Content Blocking
vendor_redhat·2025-05-14·CVSS 6.5
CVE-2025-3932 [MEDIUM] CWE-288 thunderbird: Tracking Links in Attachments Bypassed Remote Content Blocking
thunderbird: Tracking Links in Attachments Bypassed Remote Content Blocking
It was possible to craft an email that showed a tracking link as an attachment. If the user attempted to open the attachment, Thunderbird automatically accessed the link. The configuration to block remote content did not prevent that. Thunderbird has been fixed to no longer allow access to web pages listed in the X-Mozilla-External-Attachment-URL header of an email. This vulnerability affects Thunderbird < 128.10.1 and Thunderbird < 138.0.1.
The Mozilla Foundation's Security Advisory describes the following issue: It is possible to craft an email that shows a tracking link as an attachment. If the user attempts to open the attachment, Thunderbird automatically accesses the link. The configuration to block remote
Debian
CVE-2025-3932: thunderbird - It was possible to craft an email that showed a tracking link as an attachment. ...
vendor_debian·2025·CVSS 6.5
CVE-2025-3932 [MEDIUM] CVE-2025-3932: thunderbird - It was possible to craft an email that showed a tracking link as an attachment. ...
It was possible to craft an email that showed a tracking link as an attachment. If the user attempted to open the attachment, Thunderbird automatically accessed the link. The configuration to block remote content did not prevent that. Thunderbird has been fixed to no longer allow access to web pages listed in the X-Mozilla-External-Attachment-URL header of an email. This vulnerability affects Thunderbird < 128.10.1 and Thunderbird < 138.0.1.
Scope: local
bookworm: resolved (fixed in 1:128.10.1esr-1~deb12u1)
bullseye: resolved (fixed in 1:128.10.1esr-1~deb11u1)
forky: resolved (fixed in 1:128.10.1esr-1)
sid: resolved (fixed in 1:128.10.1esr-1)
trixie: resolved (fixed in 1:128.10.1esr-1)
Mozilla
Mozilla Foundation Security Advisory 2025-34: CVE-2025-3932
vendor_mozilla·CVSS 6.5
CVE-2025-3932 [MEDIUM] Mozilla Foundation Security Advisory 2025-34: CVE-2025-3932
Mozilla Foundation Security Advisory 2025-34
CVE: CVE-2025-3932
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 128.10.1
Mozilla
Mozilla Foundation Security Advisory 2025-35: CVE-2025-3932
vendor_mozilla·CVSS 6.5
CVE-2025-3932 [MEDIUM] Mozilla Foundation Security Advisory 2025-35: CVE-2025-3932
Mozilla Foundation Security Advisory 2025-35
CVE: CVE-2025-3932
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 138.0.1
GHSA
GHSA-jfxg-6gv4-f2gh: It was possible to craft an email that showed a tracking link as an attachment
ghsa_unreviewed·2025-05-14
CVE-2025-3932 [HIGH] CWE-288 GHSA-jfxg-6gv4-f2gh: It was possible to craft an email that showed a tracking link as an attachment
It was possible to craft an email that showed a tracking link as an attachment. If the user attempted to open the attachment, Thunderbird automatically accessed the link. The configuration to block remote content did not prevent that. Thunderbird has been fixed to no longer allow access to web pages listed in the X-Mozilla-External-Attachment-URL header of an email. This vulnerability affects Thunderbird < 128.10.1 and Thunderbird < 138.0.1.
OSV
CVE-2025-3932: It was possible to craft an email that showed a tracking link as an attachment
osv·2025-05-14·CVSS 6.5
CVE-2025-3932 [MEDIUM] CVE-2025-3932: It was possible to craft an email that showed a tracking link as an attachment
It was possible to craft an email that showed a tracking link as an attachment. If the user attempted to open the attachment, Thunderbird automatically accessed the link. The configuration to block remote content did not prevent that. Thunderbird has been fixed to no longer allow access to web pages listed in the X-Mozilla-External-Attachment-URL header of an email. This vulnerability affects Thunderbird < 128.10.1 and Thunderbird < 138.0.1.
No detection rules found.
No public exploits indexed.
2025-05-14
Published