Description
If a Thunderbird user replied to a crafted HTML email containing a <code>meta</code> tag, with the <code>meta</code> tag having the <code>http-equiv="refresh"</code> attribute, and the content attribute specifying an URL, then Thunderbird started a network request to that URL, regardless of the configuration to block remote content. In combination with certain other HTML elements and attributes in the email, it was possible to execute JavaScript code included in the message in the context of the message compose document. The JavaScript code was able to perform actions including, but probably not limited to, read and modify the contents of the message compose document, including the quoted original message, which could potentially contain the decrypted plaintext of encrypted data in the crafted email. The contents could then be transmitted to the network, either to the URL specified in the META refresh tag, or to a different URL, as the JavaScript code could modify the URL specified in the document. This bug doesn't affect users who have changed the default Message Body display setting to 'simple html' or 'plain text'. This vulnerability affects Thunderbird < 102.2.1 and Thunderbird < 91.13.1.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Thunderbird | unspecified – < 102.2.1, unspecified – < 91.13.1 | 102.2.1 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | thunderbird | 1:102.2.1-1 | — |
| Debian 13 | thunderbird | 1:102.2.1-1 | — |
| Debian 12 | thunderbird | 1:102.2.1-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | thunderbird | 1:102.2.2+build1-0ubuntu0.22.04.1 | USN-5663-1 |
| Ubuntu 20.04 LTS | thunderbird | 1:102.2.2+build1-0ubuntu0.20.04.1 | USN-5663-1 |
| Ubuntu 18.04 LTS | thunderbird | 1:102.2.2+build1-0ubuntu0.18.04.1 | USN-5663-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | thunderbird | 102.3.0-3.el9_0 | RHSA-2022:6717 |
| RHEL 8 | thunderbird | 102.3.0-3.el8_6 | RHSA-2022:6708 |
| RHEL 7 | thunderbird | 102.3.0-3.el7_9 | RHSA-2022:6710 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8.4 EUS | thunderbird | 102.3.0-3.el8_4 | RHSA-2022:6713 |
| RHEL 8.2 EUS | thunderbird | 102.3.0-3.el8_2 | RHSA-2022:6715 |
| RHEL 8.1 E4S | thunderbird | 102.3.0-3.el8_1 | RHSA-2022:6716 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | thunderbird | 102.3.0-3.el9_0.alma | ALSA-2022:6717 |
| AlmaLinux 8 | thunderbird | 102.3.0-3.el8_6.alma | ALSA-2022:6708 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | thunderbird | 102.3.0-3.el8_6 | RLSA-2022:6708 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP4 | MozillaThunderbird | 102.2.2-150200.8.82.1 | SUSE-SU-2022:3281-1 |
| SLES 15 SP3 | MozillaThunderbird | 102.2.2-150200.8.82.1 | SUSE-SU-2022:3281-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaThunderbird | 102.2.1-1.1 | openSUSE-SU-2024:12299-1 |
| openSUSE Leap 15.4 | MozillaThunderbird | 102.2.2-150200.8.82.1 | SUSE-SU-2022:3281-1 |
| openSUSE Leap 15.3 | MozillaThunderbird | 102.2.2-150200.8.82.1 | SUSE-SU-2022:3281-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | thunderbird | 102.4.0-1.amzn2.0.1 | ALAS2-2022-1900 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | thunderbird | 102.3.0-3.0.1.el9_0 | ELSA-2022-6717 |
| Oracle Linux 8 | thunderbird | 102.3.0-3.0.1.el8_6 | ELSA-2022-6708 |
| Oracle Linux 7 | thunderbird | 102.3.0-3.0.1.el7_9 | ELSA-2022-6710 |
Advisories 18
- ALSA-2022:6717 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2022:6708 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2022:6710 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-5663-1 thunderbird vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- RLSA-2022:6708 Important: thunderbird security update Rocky Linux Security Advisories · Feb 4, 2026
- openSUSE-SU-2024:12299-1 MozillaThunderbird-102.2.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:3281-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- RHSA-2022:6717 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:6715 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:6716 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:6713 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:6708 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- ALAS2-2022-1900 Important: thunderbird security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · May 9, 2024
- WID-SEC-2023-0561 Xerox FreeFlow Print Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · May 18, 2023
- WID-SEC-2022-1246 Mozilla Thunderbird: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 22, 2023
- ELSA-2022-6710 Important: thunderbird security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 26, 2022
- ELSA-2022-6717 Important: thunderbird security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Sep 28, 2022
- ELSA-2022-6708 Important: thunderbird security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Sep 28, 2022