Linux · 
Red Hat · Security advisory · November 20, 2025
Red Hat · Security advisory · November 20, 2025RHSA-2025:21842: thunderbird security update
RHSA-2025:21842, released November 20, 2025, fixes 9 CVEs in thunderbird (version 0:140.5.0-1.el9_7). None of them is reported as exploited. Patch Radar priority: High.
High
CVEs closed
9
None rated Critical
Exploited
0
None reported
Highest CVSS
8.8
Base score, 0 to 10
Highest EPSS
0.0041
35th percentile
Priority of the 9 CVEs
Patch now 0
Urgent 0
High 9
Routine 0
Fixed package versions
| Product | Release | Fixed in |
|---|---|---|
| thunderbird | RHEL 9 | 0:140.5.0-1.el9_7 |
CVEs this fix closes
| Priority | CVE | Title | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|
| High | CVE-2025-13016 | Incorrect boundary conditions in the JavaScript: WebAssembly component | 7.5 | 0.0041 | None reported |
| High | CVE-2025-13014 | Use-after-free in the Audio/Video component | 8.8 | 0.0032 | None reported |
| High | CVE-2025-13020 | Use-after-free in the WebRTC: Audio/Video component | 8.8 | 0.0031 | None reported |
| High | CVE-2025-13017 | Same-origin policy bypass in the DOM: Notifications component | 8.1 | 0.0028 | None reported |
| High | CVE-2025-13018 | Mitigation bypass in the DOM: Security component | 8.1 | 0.0028 | None reported |
| High | CVE-2025-13019 | Same-origin policy bypass in the DOM: Workers component | 8.1 | 0.0028 | None reported |
| High | CVE-2025-13012 | Race condition in the Graphics component | 7.5 | 0.0024 | None reported |
| High | CVE-2025-13015 | Spoofing issue in Firefox | 7.5 | 0.0023 | None reported |
| High | CVE-2025-13013 | Mitigation bypass in the DOM: Core & HTML component | 7.5 | 0.0022 | None reported |
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