p PatchFirst

CVE-2025-3522

CVE-2025-3522 · Leak of hashed Window credentials via crafted attachment URL

This page contains facts from public vulnerability sources. Check the original advisory before updating.

Thunderbird processes the X-Mozilla-External-Attachment-URL header to handle attachments which can be hosted externally. When an email is opened, Thunderbird accesses the specified URL to determine file size, and navigates to it when the user clicks the attachment. Because the URL is not validated or sanitized, it can reference internal resources like chrome:// or SMB share file:// links, potentially leading to hashed Windows credential leakage and opening the door to more serious security issues. This vulnerability was fixed in Thunderbird 137.0.2 and Thunderbird 128.9.2.

CVSS 6.3 · Medium · EPSS 0.3% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • thunderbird

    Versions
    • ≥ 128.9.2, ≤ 128.*: Not affected (rpm)
    • ≥ 137.0.2: Not affected (rpm)

    No fix published

  • thunderbird Debian:12

    Versions
    • 1:102.11.0-1
    • 1:102.12.0-1
    • 1:102.12.0-1~deb10u1
    • 1:102.12.0-1~deb11u1
    • 1:102.12.0-1~deb12u1
    • 1:102.13.0-1
    • 1:102.13.0-1~deb10u1
    • 1:102.13.0-1~deb11u1
    • 1:102.13.0-1~deb12u1
    • 1:102.13.1-1
    • 1:102.13.1-1~deb10u1
    • 1:102.13.1-1~deb11u1
    • 1:102.13.1-1~deb12u1
    • 1:102.14.0-1~deb10u1
    • 1:102.14.0-1~deb11u1
    • 1:102.14.0-1~deb12u1
    • 1:102.15.0-1~deb10u1
    • 1:102.15.0-1~deb11u1
    • 1:102.15.0-1~deb12u1
    • 1:102.15.1-1~deb10u1
    • 1:102.15.1-1~deb11u1
    • 1:102.15.1-1~deb12u1
    • 1:103.0~b5-1
    • 1:104.0~b2-1
    • 1:110.0~b4-1
    • 1:112.0~b1-1
    • 1:113.0~b3-1
    • 1:114.0~b2-1
    • 1:115.0-1
    • 1:115.0.1-1
    • 1:115.0.1-2
    • 1:115.0~b4-1
    • 1:115.0~b6-1
    • 1:115.1.0-1
    • 1:115.1.1-1
    • 1:115.10.1-1
    • 1:115.10.1-1~deb10u1
    • 1:115.10.1-1~deb11u1
    • 1:115.10.1-1~deb12u1
    • 1:115.11.0-1
    • 1:115.11.0-1~deb10u1
    • 1:115.11.0-1~deb11u1
    • 1:115.11.0-1~deb12u1
    • 1:115.12.0-1
    • 1:115.12.0-1~deb10u1
    • 1:115.12.0-1~deb11u1
    • 1:115.12.0-1~deb12u1
    • 1:115.13.0-1
    • 1:115.13.0-1~deb11u1
    • 1:115.13.0-1~deb12u1
    • 1:115.14.0-1~deb11u1
    • 1:115.14.0-1~deb12u1
    • 1:115.15.0-1~deb11u1
    • 1:115.15.0-1~deb12u1
    • 1:115.16.0esr-1~deb11u1
    • 1:115.16.0esr-1~deb12u1
    • 1:115.2.0-1
    • 1:115.2.2-1
    • 1:115.3.0-1
    • 1:115.3.0-1~deb12u1
    • 1:115.3.1-1
    • 1:115.3.1-1~deb10u1
    • 1:115.3.1-1~deb11u1
    • 1:115.3.1-1~deb12u1
    • 1:115.4.1-1
    • 1:115.4.1-1~deb10u1
    • 1:115.4.1-1~deb11u1
    • 1:115.4.1-1~deb12u1
    • 1:115.5.0-1
    • 1:115.5.0-1~deb10u1
    • 1:115.5.0-1~deb11u1
    • 1:115.5.0-1~deb12u1
    • 1:115.5.1-1
    • 1:115.5.2-1
    • 1:115.6.0-1
    • 1:115.6.0-1~deb10u1
    • 1:115.6.0-1~deb11u1
    • 1:115.6.0-1~deb12u1
    • 1:115.7.0-1
    • 1:115.7.0-1~deb10u1
    • 1:115.7.0-1~deb11u1
    • 1:115.7.0-1~deb12u1
    • 1:115.8.0-1
    • 1:115.8.0-1~deb10u1
    • 1:115.8.0-1~deb11u1
    • 1:115.8.0-1~deb12u1
    • 1:115.8.1-1
    • 1:115.9.0-1
    • 1:115.9.0-1~deb10u1
    • 1:115.9.0-1~deb11u1
    • 1:115.9.0-1~deb12u1
    • 1:116.0~b7-1
    • 1:117.0~b5-1
    • 1:120.0~b1-1
    • 1:121.0~b3-1
    • 1:122.0~b2-1
    • 1:124.0~b5-1
    • 1:125.0~b3-1
    • 1:127.0~b5-1
    • 1:128.0esr-1
    • 1:128.0~b5-1
    • 1:128.1.0esr-1
    • 1:128.1.1esr-1
    • 1:128.10.0esr-1~deb11u1
    • 1:128.2.0esr-1
    • 1:128.2.1esr-1
    • 1:128.2.3esr-1
    • 1:128.3.0esr-1
    • 1:128.3.2esr-1
    • 1:128.4.0esr-1
    • 1:128.4.0esr-1~deb11u1
    • 1:128.4.0esr-1~deb12u1
    • 1:128.4.2esr-1
    • 1:128.4.3esr-1
    • 1:128.4.3esr-1~deb11u1
    • 1:128.4.3esr-1~deb12u1
    • 1:128.5.0esr-1
    • 1:128.5.0esr-1~deb11u1
    • 1:128.5.0esr-1~deb12u1
    • 1:128.5.2esr-1
    • 1:128.6.0esr-1
    • 1:128.6.0esr-1~deb11u1
    • 1:128.6.0esr-1~deb12u1
    • 1:128.7.0esr-1
    • 1:128.7.0esr-1~deb11u1
    • 1:128.7.0esr-1~deb12u1
    • 1:128.8.0esr-1
    • 1:128.8.0esr-1~deb11u1
    • 1:128.8.0esr-1~deb12u1
    • 1:128.9.0esr-1
    • 1:128.9.0esr-1~deb11u1
    • 1:128.9.0esr-1~deb12u1
    Affected ranges
    • ECOSYSTEM: < 1:128.10.0esr-1~deb12u1

    Update to 1:128.10.0esr-1~deb12u1

  • thunderbird Debian:13

    Affected ranges
    • ECOSYSTEM: < 1:128.10.0esr-1

    Update to 1:128.10.0esr-1

  • thunderbird Debian:14

    Affected ranges
    • ECOSYSTEM: < 1:128.10.0esr-1

    Update to 1:128.10.0esr-1

  • thunderbird Ubuntu:22.04:LTS

    Versions
    • 1:91.1.2+build1-0ubuntu1
    • 1:91.3.0+build2-0ubuntu1
    • 1:91.3.1+build1-0ubuntu1
    • 1:91.3.2+build1-0ubuntu1
    • 1:91.4.0+build1.1-0ubuntu1
    • 1:91.4.0+build2-0ubuntu1
    • 1:91.5.0+build1-0ubuntu1
    • 1:91.5.1+build1-0ubuntu1
    • 1:91.6.1+build1-0ubuntu1
    • 1:91.7.0+build1-0ubuntu1
    • 1:91.7.0+build2-0ubuntu1
    • 1:91.8.0+build2-0ubuntu1
    • 1:91.9.1+build1-0ubuntu0.22.04.1
    • 1:91.11.0+build2-0ubuntu0.22.04.1
    • 1:102.2.2+build1-0ubuntu0.22.04.1
    • 1:102.4.2+build2-0ubuntu0.22.04.1
    • 1:102.7.1+build2-0ubuntu0.22.04.1
    • 1:102.8.0+build2-0ubuntu0.22.04.1
    • 1:102.9.0+build1-0ubuntu0.22.04.1
    • 1:102.10.0+build2-0ubuntu0.22.04.1
    • 1:102.11.0+build1-0ubuntu0.22.04.1
    • 1:102.13.0+build1-0ubuntu0.22.04.1
    • 1:102.15.0+build1-0ubuntu0.22.04.1
    • 1:102.15.1+build1-0ubuntu0.22.04.1
    • 1:115.3.1+build1-0ubuntu0.22.04.2
    • 1:115.4.1+build1-0ubuntu0.22.04.1
    • 1:115.5.0+build1-0ubuntu0.22.04.1
    • 1:115.6.0+build2-0ubuntu0.22.04.1
    • 1:115.8.1+build1-0ubuntu0.22.04.1
    • 1:115.9.0+build1-0ubuntu0.22.04.1
    • 1:115.10.1+build1-0ubuntu0.22.04.1
    • 1:115.11.0+build2-0ubuntu0.22.04.1
    • 1:115.12.0+build3-0ubuntu0.22.04.1
    • 1:115.13.0+build5-0ubuntu0.22.04.1
    • 1:115.15.0+build1-0ubuntu0.22.04.1
    • 1:115.16.0+build2-0ubuntu0.22.04.1
    • 1:115.18.0+build1-0ubuntu0.22.04.1
    Affected ranges
    • ECOSYSTEM: < 1:128.12.0+build1-0ubuntu0.22.04.1

    Update to 1:128.12.0+build1-0ubuntu0.22.04.1

Original sources

Check your server →