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TI-2025-03623 Aliases CVE-2025-4083GHSA-v4qx-h7r5-6qc8

Process isolation bypass using "javascript:" URI links in cross-origin frames

Priority MEDIUM 48CWE-653Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · None
Fix status
Partial Red Hat: 15 fixed, 4 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat.

Summary

A process isolation vulnerability in Thunderbird stemmed from improper handling of javascript: URIs, which could allow content to execute in the top-level document's process instead of the intended frame, potentially enabling a sandbox escape. This vulnerability was fixed in Firefox 138, Firefox ESR 128.10, Firefox ESR 115.23, Thunderbird 138, and Thunderbird 128.10.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00459 39th percentileScored 2026-11-07
Fix Partial Firefox (Mozilla): 115.23, 128.10, 138Thunderbird (Mozilla): 128.10, 138Red Hat: 22 advisoriesRed Hat: 15 fixed, 4 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
MozillaFirefox—115.23, 128.10, 138Patch availableCNA
MozillaThunderbird—128.10, 138Patch availableCNA
  • Firefox VendorMozilla Affected — Fixed in 115.23, 128.10, 138 Patch available CNA
  • Thunderbird VendorMozilla Affected — Fixed in 128.10, 138 Patch available CNA

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*before 115.23VulnerableMozilla
cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*before 138.0VulnerableMozilla
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*128.0 to before 128.10VulnerableMozilla
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*before 128.10.0VulnerableMozilla
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*before 138.0VulnerableMozilla
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:* Versions before 115.23 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:* Versions before 138.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:* Versions 128.0 to before 128.10 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:* Versions before 128.10.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:* Versions before 138.0 Vulnerable ·Mozilla

Remediation

  • Fix · CNA Firefox (Mozilla) Fixed in 115.23, 128.10, 138
  • Fix · CNA Thunderbird (Mozilla) Fixed in 128.10, 138

Red Hat 22 advisories

  • RHSA-2025:7695 Released 2025-05-15 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.4) thunderbird-128.10.0-1.el9_4
  • RHSA-2025:7694 Released 2025-05-15 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.2) thunderbird-128.10.0-1.el9_2
  • RHSA-2025:7689 Released 2025-05-15 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.8) thunderbird-128.10.0-1.el8_8
Show 19 more Red Hat advisories
  • RHSA-2025:7690 Released 2025-05-15 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.6) thunderbird-128.10.0-1.el8_6
    • Red Hat Enterprise Linux AppStream E4S (v.8.6) thunderbird-128.10.0-1.el8_6
    • Red Hat Enterprise Linux AppStream TUS (v.8.6) thunderbird-128.10.0-1.el8_6
  • RHSA-2025:7692 Released 2025-05-15 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.0) thunderbird-128.10.0-1.el9_0
  • RHSA-2025:7691 Released 2025-05-15 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.4) thunderbird-128.10.0-1.el8_4
    • Red Hat Enterprise Linux AppStream E4S (v.8.4) thunderbird-128.10.0-1.el8_4
    • Red Hat Enterprise Linux AppStream TUS (v.8.4) thunderbird-128.10.0-1.el8_4
  • RHSA-2025:7693 Released 2025-05-15 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream AUS (v. 8.2) thunderbird-128.10.0-1.el8_2
  • RHSA-2025:7543 Released 2025-05-14 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.8) firefox-128.10.0-1.el8_8
  • RHSA-2025:7544 Released 2025-05-14 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.6) firefox-128.10.0-1.el8_6
    • Red Hat Enterprise Linux AppStream E4S (v.8.6) firefox-128.10.0-1.el8_6
    • Red Hat Enterprise Linux AppStream TUS (v.8.6) firefox-128.10.0-1.el8_6
  • RHSA-2025:7547 Released 2025-05-14 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream AUS (v. 8.2) firefox-128.10.0-1.el8_2
  • RHSA-2025:7545 Released 2025-05-14 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.4) firefox-128.10.0-1.el8_4
    • Red Hat Enterprise Linux AppStream E4S (v.8.4) firefox-128.10.0-1.el8_4
    • Red Hat Enterprise Linux AppStream TUS (v.8.4) firefox-128.10.0-1.el8_4
  • 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-2025:7506 Released 2025-05-13 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 10) firefox-128.10.0-1.el10_0
  • RHSA-2025:7428 Released 2025-05-13 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 9) firefox-128.10.0-1.el9_6, firefox-x11-128.10.0-1.el9_6
  • RHSA-2025:4797 Released 2025-05-12 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 8) thunderbird-128.10.0-1.el8_10
  • RHSA-2025:4752 Released 2025-05-08 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.2) firefox-128.10.0-1.el9_2, firefox-x11-128.10.0-1.el9_2
  • RHSA-2025:4751 Released 2025-05-08 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux Server (v. 7 ELS) firefox-128.10.0-1.el7_9
  • RHSA-2025:4756 Released 2025-05-08 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.4) firefox-128.10.0-1.el9_4, firefox-x11-128.10.0-1.el9_4
  • RHSA-2025:4753 Released 2025-05-08 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.0) firefox-128.10.0-1.el9_0
  • RHSA-2025:4460 Released 2025-05-05 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 9) thunderbird-128.10.0-1.el9_5
  • RHSA-2025:4458 Released 2025-05-05 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 8) firefox-128.10.0-1.el8_10
  • RHSA-2025:4443 Released 2025-05-05 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 9) firefox-128.10.0-1.el9_5, firefox-x11-128.10.0-1.el9_5

Vendor assessments

Red Hat

Red Hat rating: Important. 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-2025:7506, RHSA-2025:7507
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2025:4458, RHSA-2025:4797
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2025:4443, RHSA-2025:4460, RHSA-2025:7428
Red Hat Enterprise Linux AppStream AUS (v. 8.2)Fixed RHSA-2025:7547, RHSA-2025:7693
Red Hat Enterprise Linux AppStream AUS (v.8.4)Fixed RHSA-2025:7545, RHSA-2025:7691
Red Hat Enterprise Linux AppStream AUS (v.8.6)Fixed RHSA-2025:7544, RHSA-2025:7690
Red Hat Enterprise Linux AppStream E4S (v.8.4)Fixed RHSA-2025:7545, RHSA-2025:7691
Red Hat Enterprise Linux AppStream E4S (v.8.6)Fixed RHSA-2025:7544, RHSA-2025:7690
Red Hat Enterprise Linux AppStream E4S (v.9.0)Fixed RHSA-2025:4753, RHSA-2025:7692
Red Hat Enterprise Linux AppStream EUS (v.8.8)Fixed RHSA-2025:7543, RHSA-2025:7689
Red Hat Enterprise Linux AppStream EUS (v.9.2)Fixed RHSA-2025:4752, RHSA-2025:7694
Red Hat Enterprise Linux AppStream EUS (v.9.4)Fixed RHSA-2025:4756, RHSA-2025:7695
Red Hat Enterprise Linux AppStream TUS (v.8.4)Fixed RHSA-2025:7545, RHSA-2025:7691
Red Hat Enterprise Linux AppStream TUS (v.8.6)Fixed RHSA-2025:7544, RHSA-2025:7690
Red Hat Enterprise Linux Server (v. 7 ELS)Fixed RHSA-2025:4751

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-4083
  2. 2026-10-03 Alias added: GHSA-v4qx-h7r5-6qc8

References

Advisory 5

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 3444 →

Sources

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