# CVE-2023-0430: Mozilla Thunderbird and 1 other: Improper Certificate Validation

CVE-2023-0430 is fixed in 2 products on 2 platforms, first by RHSA-2023:0606, released February 6, 2023. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-0430
- Priority: High
- CVSS: 7.5 (Important)
- EPSS: 0.0037
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 6, 2023
- Weakness: CWE-295: Improper Certificate Validation
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2023-0430

## Description

Certificate OCSP revocation status was not checked when verifying S/Mime signatures. Mail signed with a revoked certificate would be displayed as having a valid signature. Thunderbird versions from 68 to 102.7.0 were affected by this bug. This vulnerability affects Thunderbird < 102.7.1.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | Mozilla Thunderbird (en-US) | 115.8.0 | [Mozilla Thunderbird (en-US) 115.8.0](https://patchblox.com/security/data/fix/windows-app/mozilla.thunderbird-115.8.0.md) | Feb 21, 2024 |
| Linux | thunderbird Debian 12.15 (bookworm) | 1:102.7.1+1-1 | [DEBIAN-CVE-2023-0430](https://patchblox.com/security/data/fix/linux/debian-cve-2023-0430.md) | Jun 2, 2023 |
| Linux | thunderbird Debian 13.5 (trixie) | 1:102.7.1+1-1 | [DEBIAN-CVE-2023-0430](https://patchblox.com/security/data/fix/linux/debian-cve-2023-0430.md) | Jun 2, 2023 |
| Linux | thunderbird Debian 14 | 1:102.7.1+1-1 | [DEBIAN-CVE-2023-0430](https://patchblox.com/security/data/fix/linux/debian-cve-2023-0430.md) | Jun 2, 2023 |
| Linux | thunderbird RHEL 8 | 0:102.7.1-2.el8_7 | [RHSA-2023:0606](https://patchblox.com/security/data/fix/linux/rhsa-2023-0606.md) | Feb 6, 2023 |
| Linux | thunderbird RHEL 9 | 0:102.7.1-2.el9_1 | [RHSA-2023:0608](https://patchblox.com/security/data/fix/linux/rhsa-2023-0608.md) | Feb 6, 2023 |
| Linux | thunderbird almalinux 8 | 102.7.1-2.el8_7.alma | [ALSA-2023:0606](https://patchblox.com/security/data/fix/linux/alsa-2023-0606.md) | Feb 6, 2023 |
| Linux | thunderbird almalinux 9 | 102.7.1-2.el9_1.alma | [ALSA-2023:0608](https://patchblox.com/security/data/fix/linux/alsa-2023-0608.md) | Feb 6, 2023 |
| Linux | thunderbird ol 8 | 0:102.7.1-2.0.1.el8_7 | [ELSA-2023-0606](https://patchblox.com/security/data/fix/linux/elsa-2023-0606.md) | Feb 7, 2023 |
| Linux | thunderbird ol 9 | 0:102.7.1-2.0.1.el9_1 | [ELSA-2023-0608](https://patchblox.com/security/data/fix/linux/elsa-2023-0608.md) | Feb 7, 2023 |
| Linux | thunderbird rocky 8 | 0:102.7.1-2.el8_7 | [RLSA-2023:0606](https://patchblox.com/security/data/fix/linux/rlsa-2023-0606.md) | Feb 6, 2023 |
| Linux | thunderbird rocky 9 | 0:102.7.1-2.el9_1 | [RLSA-2023:0608](https://patchblox.com/security/data/fix/linux/rlsa-2023-0608.md) | Feb 6, 2023 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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