Is CVE-2025-3932 in the CISA KEV catalog?

No. CVE-2025-3932 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-3932?

CVE-2025-3932 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2025-3932?

CVE-2025-3932 has an EPSS score of 0.31% (23th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-3932?

Upgrade thunderbird on debian 11 to 1:128.10.1esr-1~deb11u1 or later. Fixes are available for 9 affected products.

CVE & CISA-KEV Catalog

CVE-2025-3932

MEDIUM

6.5

CVSS v3

NVD

Description

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.

CWE-288

How to fix

Remediation Available

thunderbirdDebian

Fixed in:1:128.10.1esr-1~deb11u1CVE-2025-3932

Fixed in:1:128.10.1esr-1~deb12u1CVE-2025-3932

Fixed in:1:128.10.1esr-1CVE-2025-3932

thunderbirdRed Hat / RHEL

Fixed in:0:128.10.1-1.el10_0RHSA-2025:8196

Fixed in:0:128.10.1-1.el8_8RHSA-2025:8784

Fixed in:0:128.10.1-1.el8_4RHSA-2025:8507

Fixed in:0:128.10.1-1.el8_8RHSA-2025:8784

Fixed in:0:128.10.1-1.el8_6RHSA-2025:8594

Fixed in:0:128.11.0-1.el8_10RHSA-2025:8756

Fixed in:0:128.10.1-1.el8_6RHSA-2025:8594

Fixed in:0:128.11.0-1.el8_10RHSA-2025:8756

Fixed in:0:128.10.1-1.el8_6RHSA-2025:8594

Fixed in:0:128.10.1-1.el8_8RHSA-2025:8784

Fixed in:0:128.10.1-1.el8_6RHSA-2025:8594

Fixed in:0:128.11.0-1.el8_10RHSA-2025:8756

Fixed in:0:128.10.1-1.el8_2RHSA-2025:8391

Fixed in:0:128.11.0-1.el8_10RHSA-2025:8756

Fixed in:0:128.10.1-1.el9_4RHSA-2025:8325

Fixed in:0:128.10.1-1.el9_0RHSA-2025:8324

Fixed in:0:128.10.1-1.el9_4RHSA-2025:8325

Fixed in:0:128.10.1-1.el9_0RHSA-2025:8324

Fixed in:0:128.10.1-1.el9_6RHSA-2025:8203

Fixed in:0:128.10.1-1.el9_2RHSA-2025:8326

Fixed in:0:128.10.1-1.el9_6RHSA-2025:8203

Fixed in:0:128.10.1-1.el9_2RHSA-2025:8326

Fixed in:0:128.10.1-1.el9_6RHSA-2025:8203

Fixed in:0:128.10.1-1.el9_2RHSA-2025:8326

Fixed in:0:128.10.1-1.el9_6RHSA-2025:8203

Fixed in:0:128.10.1-1.el9_4RHSA-2025:8325

Fixed in:0:128.10.1-1.el9_0RHSA-2025:8324

thunderbirdRocky

Fixed in:0:128.10.1-1.el10_0RHSA-2025:8196

Fixed in:0:128.10.1-1.el8_4RHSA-2025:8507

Fixed in:0:128.11.0-1.el8_10RHSA-2025:8756

Fixed in:0:128.10.1-1.el8_8RHSA-2025:8784

Fixed in:0:128.10.1-1.el8_6RHSA-2025:8594

Fixed in:0:128.10.1-1.el8_4RHSA-2025:8507

Fixed in:0:128.10.1-1.el8_6RHSA-2025:8594

Fixed in:0:128.10.1-1.el8_8RHSA-2025:8784

Fixed in:0:128.10.1-1.el8_6RHSA-2025:8594

Fixed in:0:128.11.0-1.el8_10RHSA-2025:8756

Fixed in:0:128.10.1-1.el8_8RHSA-2025:8784

Fixed in:0:128.10.1-1.el8_2RHSA-2025:8391

Fixed in:0:128.11.0-1.el8_10RHSA-2025:8756

Fixed in:0:128.10.1-1.el8_6RHSA-2025:8594

Fixed in:0:128.10.1-1.el9_6RHSA-2025:8203

Fixed in:0:128.10.1-1.el9_4RHSA-2025:8325

Fixed in:0:128.10.1-1.el9_6RHSA-2025:8203

Fixed in:0:128.10.1-1.el9_4RHSA-2025:8325

Fixed in:0:128.10.1-1.el9_6RHSA-2025:8203

Fixed in:0:128.10.1-1.el9_2RHSA-2025:8326

Fixed in:0:128.10.1-1.el9_6RHSA-2025:8203

Fixed in:0:128.10.1-1.el9_0RHSA-2025:8324

Fixed in:0:128.10.1-1.el9_6RHSA-2025:8203

thunderbird-debuginfoRed Hat / RHEL

Fixed in:0:128.10.1-1.el10_0RHSA-2025:8196

Fixed in:0:128.10.1-1.el8_6RHSA-2025:8594

Fixed in:0:128.11.0-1.el8_10RHSA-2025:8756

Fixed in:0:128.10.1-1.el8_8RHSA-2025:8784

Fixed in:0:128.10.1-1.el8_2RHSA-2025:8391

Fixed in:0:128.10.1-1.el8_4RHSA-2025:8507

Fixed in:0:128.11.0-1.el8_10RHSA-2025:8756

Fixed in:0:128.10.1-1.el8_8RHSA-2025:8784

Fixed in:0:128.11.0-1.el8_10RHSA-2025:8756

Fixed in:0:128.10.1-1.el8_6RHSA-2025:8594

Fixed in:0:128.10.1-1.el9_6RHSA-2025:8203

Fixed in:0:128.10.1-1.el9_2RHSA-2025:8326

Fixed in:0:128.10.1-1.el9_4RHSA-2025:8325

Fixed in:0:128.10.1-1.el9_0RHSA-2025:8324

thunderbird-debuginfoRocky

Fixed in:0:128.10.1-1.el10_0RHSA-2025:8196

Fixed in:0:128.10.1-1.el8_6RHSA-2025:8594

Fixed in:0:128.10.1-1.el8_2RHSA-2025:8391

Fixed in:0:128.10.1-1.el8_8RHSA-2025:8784

Fixed in:0:128.10.1-1.el8_6RHSA-2025:8594

Fixed in:0:128.11.0-1.el8_10RHSA-2025:8756

Fixed in:0:128.10.1-1.el8_8RHSA-2025:8784

Fixed in:0:128.10.1-1.el8_6RHSA-2025:8594

Fixed in:0:128.10.1-1.el8_4RHSA-2025:8507

Fixed in:0:128.11.0-1.el8_10RHSA-2025:8756

Fixed in:0:128.10.1-1.el9_6RHSA-2025:8203

Fixed in:0:128.10.1-1.el9_2RHSA-2025:8326

Fixed in:0:128.10.1-1.el9_4RHSA-2025:8325

Fixed in:0:128.10.1-1.el9_0RHSA-2025:8324

thunderbird-debugsourceRocky

Fixed in:0:128.10.1-1.el10_0RHSA-2025:8196

Fixed in:0:128.10.1-1.el8_2RHSA-2025:8391

Fixed in:0:128.11.0-1.el8_10RHSA-2025:8756

Fixed in:0:128.10.1-1.el8_6RHSA-2025:8594

Fixed in:0:128.10.1-1.el8_8RHSA-2025:8784

Fixed in:0:128.10.1-1.el8_4RHSA-2025:8507

Fixed in:0:128.11.0-1.el8_10RHSA-2025:8756

Fixed in:0:128.10.1-1.el8_8RHSA-2025:8784

Fixed in:0:128.10.1-1.el9_0RHSA-2025:8324

Fixed in:0:128.10.1-1.el9_2RHSA-2025:8326

Fixed in:0:128.10.1-1.el9_4RHSA-2025:8325

Fixed in:0:128.10.1-1.el9_6RHSA-2025:8203

Fixed in:0:128.10.1-1.el9_4RHSA-2025:8325

thunderbird-debugsourceRed Hat / RHEL

Fixed in:0:128.10.1-1.el10_0RHSA-2025:8196

Fixed in:0:128.10.1-1.el8_2RHSA-2025:8391

Fixed in:0:128.10.1-1.el8_8RHSA-2025:8784

Fixed in:0:128.10.1-1.el8_4RHSA-2025:8507

Fixed in:0:128.10.1-1.el8_6RHSA-2025:8594

Fixed in:0:128.11.0-1.el8_10RHSA-2025:8756

Fixed in:0:128.10.1-1.el8_6RHSA-2025:8594

Fixed in:0:128.10.1-1.el8_8RHSA-2025:8784

Fixed in:0:128.11.0-1.el8_10RHSA-2025:8756

Fixed in:0:128.10.1-1.el8_6RHSA-2025:8594

Fixed in:0:128.10.1-1.el9_0RHSA-2025:8324

Fixed in:0:128.10.1-1.el9_4RHSA-2025:8325

Fixed in:0:128.10.1-1.el9_0RHSA-2025:8324

Fixed in:0:128.10.1-1.el9_4RHSA-2025:8325

Fixed in:0:128.10.1-1.el9_0RHSA-2025:8324

Fixed in:0:128.10.1-1.el9_6RHSA-2025:8203

Fixed in:0:128.10.1-1.el9_4RHSA-2025:8325

Fixed in:0:128.10.1-1.el9_0RHSA-2025:8324

Fixed in:0:128.10.1-1.el9_6RHSA-2025:8203

Fixed in:0:128.10.1-1.el9_2RHSA-2025:8326

Fixed in:0:128.10.1-1.el9_4RHSA-2025:8325

Fixed in:0:128.10.1-1.el9_6RHSA-2025:8203

thunderbirdUbuntu

Fixed in:1:128.12.0+build1-0ubuntu0.22.04.1USN-7663-1

Mozilla Thunderbird (en-US)Windows application

Affected:128.10.1Fixed in:128.10.1Mozilla

Affected:129.0 138.0.1Fixed in:138.0.1Mozilla

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Exploit Intelligence

0.31%probability of exploitation in 30 days

23rdpercentile

Low risk: more likely to be exploited than 23% of all known CVEs.

References

Vendor Advisory2

Other references2

Related Vulnerabilities

Other CWE-288 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-42793	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2024-1709	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2024-27198	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2025-4427	Medium	5.3	100%	KEV	Fix
CVE-2024-55591	Critical	9.8	98%	KEV + Ransom	Fix
CVE-2023-46747	Critical	9.8	97%	KEV + Ransom	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-13.