# Mozilla Thunderbird ESR (pl) 140.1.1 Mozilla Thunderbird ESR (pl) 140.1.1, released August 5, 2025, fixes 32 CVEs in Mozilla Thunderbird ESR (pl). None of them is reported as exploited. Patch Radar priority: High. The latest Mozilla Thunderbird ESR (pl) is 153.7.0, which also fixes every one of these CVEs. - Web page: https://patchblox.com/security/fix/windows-app/mozilla.thunderbird.esr.pl-140.1.1 - Platform: Windows apps - Released: Aug 5, 2025 - Priority: High (Closes CVE-2025-0247, high severity) - CVEs: 32, exploited: 0, on CISA KEV: 0 - Superseded by: [Mozilla Thunderbird ESR (pl) 153.7.0](https://patchblox.com/security/data/product/windows-app/mozilla-thunderbird-esr-pl.md), the latest version, which also fixes every CVE listed here ## Applies to | Product | Release | Fixed in | |---|---|---| | [Mozilla Thunderbird ESR (pl)](https://patchblox.com/security/data/product/windows-app/mozilla-thunderbird-esr-pl.md) | | 140.1.1 | ## CVEs this fix closes | CVE | Priority | Title | CVSS | EPSS | Exploitation | |---|---|---|---:|---:|---| | [CVE-2025-0247](https://patchblox.com/security/data/cve/CVE-2025-0247.md) | High | Memory safety bugs fixed in Firefox 134 and Thunderbird 134 | 9.8 | 0.1070 | | | [CVE-2025-6436](https://patchblox.com/security/data/cve/CVE-2025-6436.md) | High | Memory safety bugs fixed in Firefox 140 and Thunderbird 140 | 8.1 | 0.0426 | | | [CVE-2024-11705](https://patchblox.com/security/data/cve/CVE-2024-11705.md) | High | Mozilla Firefox ESR and 8 others: NULL Pointer Dereference | 9.1 | 0.0066 | | | [CVE-2025-1011](https://patchblox.com/security/data/cve/CVE-2025-1011.md) | High | A bug in WebAssembly code generation could result in a crash | 8.8 | 0.0063 | | | [CVE-2024-11702](https://patchblox.com/security/data/cve/CVE-2024-11702.md) | High | Mozilla Firefox ESR and 8 others: Inappropriate Encoding for Output Context | 7.5 | 0.0053 | | | [CVE-2024-11700](https://patchblox.com/security/data/cve/CVE-2024-11700.md) | High | Mozilla Firefox ESR and 8 others: Improper Restriction of Rendered UI Layers or Frames | 8.1 | 0.0051 | | | [CVE-2025-4091](https://patchblox.com/security/data/cve/CVE-2025-4091.md) | High | Memory safety bugs fixed in Firefox 138, Thunderbird 138, Firefox ESR 128.10, and Thunderbird 128.10 | 8.8 | 0.0051 | | | [CVE-2025-1942](https://patchblox.com/security/data/cve/CVE-2025-1942.md) | High | Disclosure of uninitialized memory when .toUpperCase() causes string to get longer | 9.8 | 0.0048 | | | [CVE-2025-3034](https://patchblox.com/security/data/cve/CVE-2025-3034.md) | High | Memory safety bugs fixed in Firefox 137 and Thunderbird 137 | 8.1 | 0.0048 | | | [CVE-2025-5262](https://patchblox.com/security/data/cve/CVE-2025-5262.md) | High | Mozilla Thunderbird ESR and 2 others: Double Free | 7.5 | 0.0046 | | | [CVE-2025-4083](https://patchblox.com/security/data/cve/CVE-2025-4083.md) | High | Process isolation bypass using "javascript:" URI links in cross-origin frames | 9.1 | 0.0046 | | | [CVE-2025-6435](https://patchblox.com/security/data/cve/CVE-2025-6435.md) | High | Save as in Devtools could download files without sanitizing the extension | 8.1 | 0.0046 | | | [CVE-2025-1012](https://patchblox.com/security/data/cve/CVE-2025-1012.md) | High | Use-after-free during concurrent delazification | 8.8 | 0.0045 | | | [CVE-2024-9403](https://patchblox.com/security/data/cve/CVE-2024-9403.md) | High | Mozilla Firefox ESR and 7 others: Improper Restriction of Operations within the Bounds of a Memory Buffer | 7.5 | 0.0045 | | | [CVE-2025-1943](https://patchblox.com/security/data/cve/CVE-2025-1943.md) | High | Memory safety bugs fixed in Firefox 136 and Thunderbird 136 | 8.2 | 0.0044 | | | [CVE-2025-3032](https://patchblox.com/security/data/cve/CVE-2025-3032.md) | High | Leaking file descriptors from the fork server | 7.4 | 0.0041 | | | [CVE-2025-1930](https://patchblox.com/security/data/cve/CVE-2025-1930.md) | High | AudioIPC StreamData could trigger a use-after-free in the Browser process | 8.8 | 0.0040 | | | [CVE-2025-5272](https://patchblox.com/security/data/cve/CVE-2025-5272.md) | High | Memory safety bugs fixed in Firefox 139 and Thunderbird 139 | 7.3 | 0.0034 | | | [CVE-2025-4087](https://patchblox.com/security/data/cve/CVE-2025-4087.md) | High | Unsafe attribute access during XPath parsing | 8.8 | 0.0032 | | | [CVE-2025-4085](https://patchblox.com/security/data/cve/CVE-2025-4085.md) | High | Potential information leakage and privilege escalation in UITour actor | 7.1 | 0.0031 | | | [CVE-2025-3033](https://patchblox.com/security/data/cve/CVE-2025-3033.md) | High | Opening local .url files could lead to another file being opened | 7.7 | 0.0017 | | | [CVE-2024-11706](https://patchblox.com/security/data/cve/CVE-2024-11706.md) | Routine | Mozilla Firefox ESR and 8 others: NULL Pointer Dereference | 6.5 | 0.0050 | | | [CVE-2025-4082](https://patchblox.com/security/data/cve/CVE-2025-4082.md) | Routine | WebGL shader attribute memory corruption in Thunderbird for macOS | 5.9 | 0.0046 | | | [CVE-2024-11701](https://patchblox.com/security/data/cve/CVE-2024-11701.md) | Routine | Mozilla Firefox ESR and 8 others: Authentication Bypass by Spoofing | 4.3 | 0.0042 | | | [CVE-2024-10468](https://patchblox.com/security/data/cve/CVE-2024-10468.md) | Routine | Mozilla Firefox ESR and 7 others: Allocation of Resources Without Limits or Throttling | 5.3 | 0.0042 | | | [CVE-2024-11708](https://patchblox.com/security/data/cve/CVE-2024-11708.md) | Routine | Mozilla Firefox ESR and 8 others: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') | 6.5 | 0.0035 | | | [CVE-2025-4090](https://patchblox.com/security/data/cve/CVE-2025-4090.md) | Routine | Leaked library paths in Thunderbird for Android | 5.3 | 0.0034 | | | [CVE-2025-4092](https://patchblox.com/security/data/cve/CVE-2025-4092.md) | Routine | Memory safety bugs fixed in Firefox 138 and Thunderbird 138 | 6.5 | 0.0031 | | | [CVE-2025-3031](https://patchblox.com/security/data/cve/CVE-2025-3031.md) | Routine | JIT optimization bug with different stack slot sizes | 6.5 | 0.0031 | | | [CVE-2025-4086](https://patchblox.com/security/data/cve/CVE-2025-4086.md) | Routine | Specially crafted filename could be used to obscure download type | 6.5 | 0.0030 | | | [CVE-2025-4089](https://patchblox.com/security/data/cve/CVE-2025-4089.md) | Routine | Potential local code execution in "copy as cURL" command | 5.1 | 0.0019 | | | [CVE-2025-4088](https://patchblox.com/security/data/cve/CVE-2025-4088.md) | Routine | Cross-site request forgery via storage access API redirects | 6.5 | 0.0018 | | --- Data as of 2026-11-11T19:49:26Z UTC. 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