# RHSA-2020:3634: thunderbird security update

RHSA-2020:3634, released September 7, 2020, fixes 2 CVEs in thunderbird (version 0:68.12.0-1.el8_2). None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2020-3634
- Platform: Linux
- Released: Sep 7, 2020
- Priority: High (Closes CVE-2020-15669, high severity)
- CVEs: 2, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2020:3634

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [thunderbird](https://patchblox.com/security/data/product/linux/thunderbird.md) | RHEL 8 | 0:68.12.0-1.el8_2 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2020-15669](https://patchblox.com/security/data/cve/CVE-2020-15669.md) | High | firefox: Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.  This... | 8.8 | 0.0112 |  |
| [CVE-2020-15664](https://patchblox.com/security/data/cve/CVE-2020-15664.md) | Routine | Firefox ESR and 2 others: By holding a reference to the eval() function from an about:blank window, a malicious webpage could have… | 6.5 | 0.0139 |  |

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Data as of 2026-11-07T06:34:28Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo