# Mozilla Thunderbird ESR (th) 128.10.1

Mozilla Thunderbird ESR (th) 128.10.1, released May 14, 2025, fixes 2 CVEs in Mozilla Thunderbird ESR (th). None of them is reported as exploited. Patch Radar priority: High. The latest Mozilla Thunderbird ESR (th) is 153.7.0, which also fixes every one of these CVEs.

- Web page: https://patchblox.com/security/fix/windows-app/mozilla.thunderbird.esr.th-128.10.1
- Platform: Windows apps
- Released: May 14, 2025
- Priority: High (Closes CVE-2025-3909, high severity)
- CVEs: 2, exploited: 0, on CISA KEV: 0
- Superseded by: [Mozilla Thunderbird ESR (th) 153.7.0](https://patchblox.com/security/data/product/windows-app/mozilla-thunderbird-esr-th.md), the latest version, which also fixes every CVE listed here

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Mozilla Thunderbird ESR (th)](https://patchblox.com/security/data/product/windows-app/mozilla-thunderbird-esr-th.md) |  | 128.10.1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2025-3909](https://patchblox.com/security/data/cve/CVE-2025-3909.md) | High | JavaScript Execution via Spoofed PDF Attachment and file:/// Link | 8.8 | 0.0047 |  |
| [CVE-2025-3932](https://patchblox.com/security/data/cve/CVE-2025-3932.md) | High | Tracking Links in Attachments Bypassed Remote Content Blocking | 8.8 | 0.0039 |  |

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Data as of 2026-11-11T19:49:26Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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