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TI-2025-03095 Aliases CVE-2025-3523GHSA-4h7q-pj8m-5675

User Interface (UI) Misrepresentation of attachment URL

Priority LOW 28CWE-451Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
High
Impact type
Spoofing
Confidentiality · integrity · availability
Low · High · Low
Fix status
Partial Red Hat: 14 fixed, 4 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-451.

Summary

When an email contains multiple attachments with external links via the X-Mozilla-External-Attachment-URL header, only the last link is shown when hovering over any attachment. Although the correct link is used on click, the misleading hover text could trick users into downloading content from untrusted sources. This vulnerability was fixed in Thunderbird 137.0.2 and Thunderbird 128.9.2.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00319 25th percentileScored 2026-11-07
Fix Partial Thunderbird (Mozilla): 128.9.2, 137.0.2Red Hat: 11 advisoriesRed Hat: 14 fixed, 4 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—128.9.2, 137.0.2Patch availableCNA
  • Thunderbird VendorMozilla Affected — Fixed in 128.9.2, 137.0.2 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*before 128.9.2; 129.0 to before 137.0.2VulnerableMozilla
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 128.9.2; 129.0 to before 137.0.2 Vulnerable ·Mozilla

Remediation

  • Fix · CNA Thunderbird (Mozilla) Fixed in 128.9.2, 137.0.2

Red Hat 11 advisories

  • RHSA-2025:7507 Released 2025-05-13 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 10) thunderbird-128.10.0-1.el10_0
  • RHSA-2025:7435 Released 2025-05-13 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 9) thunderbird-128.10.0-1.el9_6
  • RHSA-2025:4665 Released 2025-05-07 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.6) thunderbird-128.9.2-1.el8_6
    • Red Hat Enterprise Linux AppStream E4S (v.8.6) thunderbird-128.9.2-1.el8_6
    • Red Hat Enterprise Linux AppStream TUS (v.8.6) thunderbird-128.9.2-1.el8_6
Show 8 more Red Hat advisories
  • RHSA-2025:4654 Released 2025-05-07 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.4) thunderbird-128.9.2-1.el8_4
    • Red Hat Enterprise Linux AppStream E4S (v.8.4) thunderbird-128.9.2-1.el8_4
    • Red Hat Enterprise Linux AppStream TUS (v.8.4) thunderbird-128.9.2-1.el8_4
  • RHSA-2025:4649 Released 2025-05-07 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 8) thunderbird-128.9.2-1.el8_10
  • RHSA-2025:4617 Released 2025-05-07 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.8) thunderbird-128.9.2-1.el8_8
  • RHSA-2025:4514 Released 2025-05-06 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.0) thunderbird-128.9.2-1.el9_0
  • RHSA-2025:4512 Released 2025-05-06 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.4) thunderbird-128.9.2-1.el9_4
  • RHSA-2025:4513 Released 2025-05-06 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.2) thunderbird-128.9.2-1.el9_2
  • RHSA-2025:4389 Released 2025-04-30 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream AUS (v. 8.2) thunderbird-128.9.2-1.el8_2
  • RHSA-2025:4229 Released 2025-04-28 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 9) thunderbird-128.9.2-1.el9_5

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 9AffectedNo fix yet
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2025:7507
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2025:4649
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2025:4229, RHSA-2025:7435
Red Hat Enterprise Linux AppStream AUS (v. 8.2)Fixed RHSA-2025:4389
Red Hat Enterprise Linux AppStream AUS (v.8.4)Fixed RHSA-2025:4654
Red Hat Enterprise Linux AppStream AUS (v.8.6)Fixed RHSA-2025:4665
Red Hat Enterprise Linux AppStream E4S (v.8.4)Fixed RHSA-2025:4654
Red Hat Enterprise Linux AppStream E4S (v.8.6)Fixed RHSA-2025:4665
Red Hat Enterprise Linux AppStream E4S (v.9.0)Fixed RHSA-2025:4514
Red Hat Enterprise Linux AppStream EUS (v.8.8)Fixed RHSA-2025:4617
Red Hat Enterprise Linux AppStream EUS (v.9.2)Fixed RHSA-2025:4513
Red Hat Enterprise Linux AppStream EUS (v.9.4)Fixed RHSA-2025:4512
Red Hat Enterprise Linux AppStream TUS (v.8.4)Fixed RHSA-2025:4654
Red Hat Enterprise Linux AppStream TUS (v.8.6)Fixed RHSA-2025:4665

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-3523
  2. 2026-10-03 Alias added: GHSA-4h7q-pj8m-5675

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