# Security update for MozillaThunderbird

Announcement ID: SUSE-SU-2025:02546-1  
Release Date: 2025-07-30T07:34:30Z  
Rating: important  
References:

  * bsc#1244670
  * bsc#1246664

  
Cross-References:

  * CVE-2025-6424
  * CVE-2025-6425
  * CVE-2025-6426
  * CVE-2025-6427
  * CVE-2025-6429
  * CVE-2025-6430
  * CVE-2025-6432
  * CVE-2025-6433
  * CVE-2025-6434
  * CVE-2025-6435
  * CVE-2025-6436
  * CVE-2025-8027
  * CVE-2025-8028
  * CVE-2025-8029
  * CVE-2025-8030
  * CVE-2025-8031
  * CVE-2025-8032
  * CVE-2025-8033
  * CVE-2025-8034
  * CVE-2025-8035
  * CVE-2025-8036
  * CVE-2025-8037
  * CVE-2025-8038
  * CVE-2025-8039
  * CVE-2025-8040

  
CVSS scores:

  * CVE-2025-6424 ( SUSE ):  8.7
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
  * CVE-2025-6424 ( SUSE ):  8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
  * CVE-2025-6424 ( NVD ):  9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  * CVE-2025-6425 ( SUSE ):  5.3
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
  * CVE-2025-6425 ( SUSE ):  5.4 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
  * CVE-2025-6425 ( NVD ):  4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
  * CVE-2025-6426 ( SUSE ):  5.3
    CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:L
  * CVE-2025-6426 ( SUSE ):  8.2 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:L
  * CVE-2025-6426 ( NVD ):  8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
  * CVE-2025-6427 ( SUSE ):  5.3
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
  * CVE-2025-6427 ( SUSE ):  6.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
  * CVE-2025-6427 ( NVD ):  9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
  * CVE-2025-6429 ( SUSE ):  5.3
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
  * CVE-2025-6429 ( SUSE ):  4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
  * CVE-2025-6429 ( NVD ):  6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
  * CVE-2025-6430 ( SUSE ):  5.3
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
  * CVE-2025-6430 ( SUSE ):  6.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
  * CVE-2025-6430 ( NVD ):  6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
  * CVE-2025-6432 ( SUSE ):  2.3
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
  * CVE-2025-6432 ( SUSE ):  4.2 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
  * CVE-2025-6432 ( NVD ):  8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
  * CVE-2025-6433 ( SUSE ):  5.3
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
  * CVE-2025-6433 ( SUSE ):  5.4 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
  * CVE-2025-6433 ( NVD ):  9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  * CVE-2025-6434 ( SUSE ):  5.1
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
  * CVE-2025-6434 ( SUSE ):  5.4 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
  * CVE-2025-6434 ( NVD ):  4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
  * CVE-2025-6435 ( SUSE ):  7.5
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
  * CVE-2025-6435 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
  * CVE-2025-6435 ( NVD ):  8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
  * CVE-2025-6436 ( SUSE ):  8.7
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
  * CVE-2025-6436 ( SUSE ):  8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
  * CVE-2025-6436 ( NVD ):  8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
  * CVE-2025-8027 ( SUSE ):  7.0
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N
  * CVE-2025-8027 ( SUSE ):  7.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L
  * CVE-2025-8027 ( NVD ):  6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
  * CVE-2025-8028 ( SUSE ):  7.0
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N
  * CVE-2025-8028 ( SUSE ):  7.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L
  * CVE-2025-8028 ( NVD ):  9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  * CVE-2025-8029 ( SUSE ):  2.1
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
  * CVE-2025-8029 ( SUSE ):  5.0 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
  * CVE-2025-8029 ( NVD ):  8.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
  * CVE-2025-8030 ( SUSE ):  4.6
    CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
  * CVE-2025-8030 ( SUSE ):  5.3 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
  * CVE-2025-8030 ( NVD ):  8.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
  * CVE-2025-8031 ( SUSE ):  8.7
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
  * CVE-2025-8031 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
  * CVE-2025-8031 ( NVD ):  9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  * CVE-2025-8032 ( SUSE ):  5.1
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
  * CVE-2025-8032 ( SUSE ):  6.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
  * CVE-2025-8032 ( NVD ):  8.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
  * CVE-2025-8033 ( SUSE ):  5.1
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
  * CVE-2025-8033 ( SUSE ):  4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
  * CVE-2025-8033 ( NVD ):  6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
  * CVE-2025-8034 ( SUSE ):  8.6
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
  * CVE-2025-8034 ( SUSE ):  8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
  * CVE-2025-8034 ( NVD ):  8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
  * CVE-2025-8035 ( SUSE ):  8.6
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
  * CVE-2025-8035 ( SUSE ):  8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
  * CVE-2025-8035 ( NVD ):  8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
  * CVE-2025-8036 ( SUSE ):  7.4
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
  * CVE-2025-8036 ( SUSE ):  6.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
  * CVE-2025-8036 ( NVD ):  8.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
  * CVE-2025-8037 ( SUSE ):  5.1
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
  * CVE-2025-8037 ( SUSE ):  5.4 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
  * CVE-2025-8037 ( NVD ):  9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
  * CVE-2025-8038 ( SUSE ):  5.1
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
  * CVE-2025-8038 ( SUSE ):  5.4 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
  * CVE-2025-8038 ( NVD ):  9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  * CVE-2025-8039 ( SUSE ):  5.1
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
  * CVE-2025-8039 ( SUSE ):  4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
  * CVE-2025-8039 ( NVD ):  8.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
  * CVE-2025-8040 ( SUSE ):  8.6
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
  * CVE-2025-8040 ( SUSE ):  8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
  * CVE-2025-8040 ( NVD ):  8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

  
Affected Products:

  * openSUSE Leap 15.6
  * SUSE Linux Enterprise Desktop 15 SP6
  * SUSE Linux Enterprise Desktop 15 SP7
  * SUSE Linux Enterprise Real Time 15 SP6
  * SUSE Linux Enterprise Real Time 15 SP7
  * SUSE Linux Enterprise Server 15 SP6
  * SUSE Linux Enterprise Server 15 SP7
  * SUSE Linux Enterprise Server for SAP Applications 15 SP6
  * SUSE Linux Enterprise Server for SAP Applications 15 SP7
  * SUSE Linux Enterprise Workstation Extension 15 SP6
  * SUSE Linux Enterprise Workstation Extension 15 SP7
  * SUSE Package Hub 15 15-SP6
  * SUSE Package Hub 15 15-SP7

  
  
An update that solves 25 vulnerabilities can now be installed.

## Description:

This update for MozillaThunderbird fixes the following issues:

Update to Mozilla Thunderbird 140.1 (MFSA 2025-63) (bsc#1246664):

  * CVE-2025-8027: JavaScript engine only wrote partial return value to stack
    (bmo#1968423)
  * CVE-2025-8028: Large branch table could lead to truncated instruction
    (bmo#1971581)
  * CVE-2025-8029: javascript: URLs executed on object and embed tags
    (bmo#1928021)
  * CVE-2025-8036: DNS rebinding circumvents CORS (bmo#1960834)
  * CVE-2025-8037: Nameless cookies shadow secure cookies (bmo#1964767)
  * CVE-2025-8030: Potential user-assisted code execution in "Copy as cURL"
    command (bmo#1968414)
  * CVE-2025-8031: Incorrect URL stripping in CSP reports (bmo#1971719)
  * CVE-2025-8032: XSLT documents could bypass CSP (bmo#1974407)
  * CVE-2025-8038: CSP frame-src was not correctly enforced for paths
    (bmo#1808979)
  * CVE-2025-8039: Search terms persisted in URL bar (bmo#1970997)
  * CVE-2025-8033: Incorrect JavaScript state machine for generators
    (bmo#1973990)
  * CVE-2025-8034: Memory safety bugs fixed in Firefox ESR 115.26, Firefox ESR
    128.13, Thunderbird ESR 128.13, Firefox ESR 140.1, Thunderbird ESR 140.1,
    Firefox 141 and Thunderbird 141 (bmo#1970422, bmo#1970422, bmo#1970422,
    bmo#1970422)
  * CVE-2025-8040: Memory safety bugs fixed in Firefox ESR 140.1, Thunderbird
    ESR 140.1, Firefox 141 and Thunderbird 141 (bmo#1975058, bmo#1975058,
    bmo#1975998, bmo#1975998)
  * CVE-2025-8035: Memory safety bugs fixed in Firefox ESR 128.13, Thunderbird
    ESR 128.13, Firefox ESR 140.1, Thunderbird ESR 140.1, Firefox 141 and
    Thunderbird 141 (bmo#1975961, bmo#1975961, bmo#1975961)

Update to Mozilla Thunderbird 140.0.1 (MFSA 2025-54) (bsc#1244670):

  * CVE-2025-6424: Use-after-free in FontFaceSet (bmo#1966423)
  * CVE-2025-6425: The WebCompat WebExtension shipped exposed a persistent UUID
    (bmo#1717672)
  * CVE-2025-6426: No warning when opening executable terminal files on macOS
    (bmo#1964385)
  * CVE-2025-6427: connect-src Content Security Policy restriction could be
    bypassed (bmo#1966927)
  * CVE-2025-6429: Incorrect parsing of URLs could have allowed embedding of
    youtube.com (bmo#1970658)
  * CVE-2025-6430: Content-Disposition header ignored when a file is included in
    an embed or object tag (bmo#1971140)
  * CVE-2025-6432: DNS Requests leaked outside of a configured SOCKS proxy
    (bmo#1943804)
  * CVE-2025-6433: WebAuthn would allow a user to sign a challenge on a webpage
    with an invalid TLS certificate (bmo#1954033)
  * CVE-2025-6434: HTTPS-Only exception screen lacked anti-clickjacking delay
    (bmo#1955182)
  * CVE-2025-6435: Save as in Devtools could download files without sanitizing
    the extension (bmo#1950056, bmo#1961777)
  * CVE-2025-6436: Memory safety bugs fixed in Firefox 140 and Thunderbird 140
    (bmo#1941377, bmo#1960948, bmo#1966187, bmo#1966505, bmo#1970764)

## Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like
YaST online_update or "zypper patch".  
Alternatively you can run the command listed for your product:

  * openSUSE Leap 15.6  
    zypper in -t patch openSUSE-SLE-15.6-2025-2546=1

  * SUSE Package Hub 15 15-SP6  
    zypper in -t patch SUSE-SLE-Module-Packagehub-Subpackages-15-SP6-2025-2546=1

  * SUSE Package Hub 15 15-SP7  
    zypper in -t patch SUSE-SLE-Module-Packagehub-Subpackages-15-SP7-2025-2546=1

  * SUSE Linux Enterprise Workstation Extension 15 SP6  
    zypper in -t patch SUSE-SLE-Product-WE-15-SP6-2025-2546=1

  * SUSE Linux Enterprise Workstation Extension 15 SP7  
    zypper in -t patch SUSE-SLE-Product-WE-15-SP7-2025-2546=1

## Package List:

  * openSUSE Leap 15.6 (aarch64 ppc64le s390x x86_64)
    * MozillaThunderbird-140.1.0-150200.8.230.1
    * MozillaThunderbird-translations-common-140.1.0-150200.8.230.1
    * MozillaThunderbird-translations-other-140.1.0-150200.8.230.1
    * MozillaThunderbird-debugsource-140.1.0-150200.8.230.1
    * MozillaThunderbird-debuginfo-140.1.0-150200.8.230.1
  * SUSE Package Hub 15 15-SP6 (aarch64 ppc64le s390x)
    * MozillaThunderbird-140.1.0-150200.8.230.1
    * MozillaThunderbird-translations-common-140.1.0-150200.8.230.1
    * MozillaThunderbird-translations-other-140.1.0-150200.8.230.1
    * MozillaThunderbird-debugsource-140.1.0-150200.8.230.1
    * MozillaThunderbird-debuginfo-140.1.0-150200.8.230.1
  * SUSE Package Hub 15 15-SP7 (aarch64 ppc64le s390x)
    * MozillaThunderbird-140.1.0-150200.8.230.1
    * MozillaThunderbird-translations-common-140.1.0-150200.8.230.1
    * MozillaThunderbird-translations-other-140.1.0-150200.8.230.1
    * MozillaThunderbird-debugsource-140.1.0-150200.8.230.1
    * MozillaThunderbird-debuginfo-140.1.0-150200.8.230.1
  * SUSE Linux Enterprise Workstation Extension 15 SP6 (x86_64)
    * MozillaThunderbird-140.1.0-150200.8.230.1
    * MozillaThunderbird-translations-common-140.1.0-150200.8.230.1
    * MozillaThunderbird-translations-other-140.1.0-150200.8.230.1
    * MozillaThunderbird-debugsource-140.1.0-150200.8.230.1
    * MozillaThunderbird-debuginfo-140.1.0-150200.8.230.1
  * SUSE Linux Enterprise Workstation Extension 15 SP7 (x86_64)
    * MozillaThunderbird-140.1.0-150200.8.230.1
    * MozillaThunderbird-translations-common-140.1.0-150200.8.230.1
    * MozillaThunderbird-translations-other-140.1.0-150200.8.230.1
    * MozillaThunderbird-debugsource-140.1.0-150200.8.230.1
    * MozillaThunderbird-debuginfo-140.1.0-150200.8.230.1

## References:

  * https://www.suse.com/security/cve/CVE-2025-6424.html
  * https://www.suse.com/security/cve/CVE-2025-6425.html
  * https://www.suse.com/security/cve/CVE-2025-6426.html
  * https://www.suse.com/security/cve/CVE-2025-6427.html
  * https://www.suse.com/security/cve/CVE-2025-6429.html
  * https://www.suse.com/security/cve/CVE-2025-6430.html
  * https://www.suse.com/security/cve/CVE-2025-6432.html
  * https://www.suse.com/security/cve/CVE-2025-6433.html
  * https://www.suse.com/security/cve/CVE-2025-6434.html
  * https://www.suse.com/security/cve/CVE-2025-6435.html
  * https://www.suse.com/security/cve/CVE-2025-6436.html
  * https://www.suse.com/security/cve/CVE-2025-8027.html
  * https://www.suse.com/security/cve/CVE-2025-8028.html
  * https://www.suse.com/security/cve/CVE-2025-8029.html
  * https://www.suse.com/security/cve/CVE-2025-8030.html
  * https://www.suse.com/security/cve/CVE-2025-8031.html
  * https://www.suse.com/security/cve/CVE-2025-8032.html
  * https://www.suse.com/security/cve/CVE-2025-8033.html
  * https://www.suse.com/security/cve/CVE-2025-8034.html
  * https://www.suse.com/security/cve/CVE-2025-8035.html
  * https://www.suse.com/security/cve/CVE-2025-8036.html
  * https://www.suse.com/security/cve/CVE-2025-8037.html
  * https://www.suse.com/security/cve/CVE-2025-8038.html
  * https://www.suse.com/security/cve/CVE-2025-8039.html
  * https://www.suse.com/security/cve/CVE-2025-8040.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1244670
  * https://bugzilla.suse.com/show_bug.cgi?id=1246664