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TI-2025-03477 Aliases CVE-2025-3932GHSA-jfxg-6gv4-f2gh

Tracking Links in Attachments Bypassed Remote Content Blocking

Priority LOW 29CWE-288Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · None · None
Fix status
Partial Red Hat: 13 fixed, 3 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-288.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00388 33rd percentileScored 2026-11-07
Fix Partial Thunderbird (Mozilla): 128.10.1, 138.0.1Red Hat: 10 advisoriesRed Hat: 13 fixed, 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MozillaThunderbird—128.10.1, 138.0.1Patch availableCNA
  • Thunderbird VendorMozilla Affected — Fixed in 128.10.1, 138.0.1 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*before 128.10.1; 129.0 to before 138.0.1VulnerableMozilla
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 128.10.1; 129.0 to before 138.0.1 Vulnerable ·Mozilla

Remediation

  • Fix · CNA Thunderbird (Mozilla) Fixed in 128.10.1, 138.0.1

Red Hat 10 advisories

  • RHSA-2025:8784 Released 2025-06-10 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream E4S (v.8.8) thunderbird-128.10.1-1.el8_8
    • Red Hat Enterprise Linux AppStream TUS (v.8.8) thunderbird-128.10.1-1.el8_8
  • RHSA-2025:8756 Released 2025-06-10 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 8) thunderbird-128.11.0-1.el8_10
  • RHSA-2025:8594 Released 2025-06-05 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.6) thunderbird-128.10.1-1.el8_6
    • Red Hat Enterprise Linux AppStream E4S (v.8.6) thunderbird-128.10.1-1.el8_6
    • Red Hat Enterprise Linux AppStream TUS (v.8.6) thunderbird-128.10.1-1.el8_6
Show 7 more Red Hat advisories
  • RHSA-2025:8507 Released 2025-06-04 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.4) thunderbird-128.10.1-1.el8_4
  • RHSA-2025:8391 Released 2025-06-02 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream AUS (v. 8.2) thunderbird-128.10.1-1.el8_2
  • RHSA-2025:8325 Released 2025-05-29 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.4) thunderbird-128.10.1-1.el9_4
  • RHSA-2025:8324 Released 2025-05-29 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.0) thunderbird-128.10.1-1.el9_0
  • RHSA-2025:8326 Released 2025-05-29 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.2) thunderbird-128.10.1-1.el9_2
  • RHSA-2025:8203 Released 2025-05-27 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 9) thunderbird-128.10.1-1.el9_6
  • RHSA-2025:8196 Released 2025-05-27 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 10) thunderbird-128.10.1-1.el10_0

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2025:8196
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2025:8756
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2025:8203
Red Hat Enterprise Linux AppStream AUS (v. 8.2)Fixed RHSA-2025:8391
Red Hat Enterprise Linux AppStream AUS (v.8.4)Fixed RHSA-2025:8507
Red Hat Enterprise Linux AppStream AUS (v.8.6)Fixed RHSA-2025:8594
Red Hat Enterprise Linux AppStream E4S (v.8.6)Fixed RHSA-2025:8594
Red Hat Enterprise Linux AppStream E4S (v.8.8)Fixed RHSA-2025:8784
Red Hat Enterprise Linux AppStream E4S (v.9.0)Fixed RHSA-2025:8324
Red Hat Enterprise Linux AppStream EUS (v.9.2)Fixed RHSA-2025:8326
Red Hat Enterprise Linux AppStream EUS (v.9.4)Fixed RHSA-2025:8325
Red Hat Enterprise Linux AppStream TUS (v.8.6)Fixed RHSA-2025:8594
Red Hat Enterprise Linux AppStream TUS (v.8.8)Fixed RHSA-2025:8784

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-3932
  2. 2026-10-03 Alias added: GHSA-jfxg-6gv4-f2gh

References

Advisory 2

Other 1

  • TI-2024-08981 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-09832 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.6
  • TI-2019-08769 Improper input validation in Mozilla Firefox ESR KEVCVSS 3.1CRITICAL 10.0
  • TI-2010-03577 Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before… KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-04799 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
  • TI-2023-04477 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
See all 2067 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences