CVE-2025-1020— Memory safety bugs fixed in Firefox 135 and Thunderbird 135
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I. Basic Information for CVE-2025-1020
Vulnerability Information
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Vulnerability Title
Memory safety bugs fixed in Firefox 135 and Thunderbird 135
Source: NVD (National Vulnerability Database)
Vulnerability Description
Memory safety bugs present in Firefox 134 and Thunderbird 134. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 135 and Thunderbird 135.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Mozilla Firefox 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mozilla Firefox是美国Mozilla基金会的一款开源Web浏览器。 Mozilla Firefox 135版本之前存在安全漏洞，该漏洞源于存在一些内存安全漏洞，可能导致任意代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Mozilla | Firefox | 135 ~ * | - | |
| Mozilla | Thunderbird | 135 ~ * | - |
II. Public POCs for CVE-2025-1020
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Mozilla · 2025-02-04 · 13 CVEs total
| CVE-2025-1015 | Unsanitized address book fields | |
| CVE-2025-1016 | Memory safety bugs fixed in Firefox 135, Thunderbird 135, Firefox ESR 115.20, Firefox ESR | |
| CVE-2025-1017 | Memory safety bugs fixed in Firefox 135, Thunderbird 135, Firefox ESR 128.7, and Thunderbi | |
| CVE-2025-0510 | Address of e-mail sender can be spoofed by malicious email | |
| CVE-2025-1014 | Certificate length was not properly checked | |
| CVE-2025-1019 | Fullscreen notification not properly displayed | |
| CVE-2025-1013 | Potential opening of private browsing tabs in normal browsing windows | |
| CVE-2025-1012 | Use-after-free during concurrent delazification | |
| CVE-2025-1018 | Fullscreen notification is not displayed when fullscreen is re-requested | |
| CVE-2025-1011 | A bug in WebAssembly code generation could result in a crash | |
| CVE-2025-1009 | Use-after-free in XSLT | |
| CVE-2025-1010 | Use-after-free in Custom Highlight |
IV. Related Vulnerabilities
Same product: Firefox
- CVE-2026-8093
Memory safety bugs fixed in Thunderbird 150.0.2 - CVE-2026-8094
Other issue in the WebRTC component - CVE-2026-8092
Memory safety bugs fixed in Thunderbird ESR 140.10.2 and Thu - CVE-2026-8091
Incorrect boundary conditions in the Audio/Video: Playback c - CVE-2026-8090
Use-after-free in the DOM: Networking component
Same vendor: Mozilla
- CVE-2026-8093
Memory safety bugs fixed in Thunderbird 150.0.2 - CVE-2026-8094
Other issue in the WebRTC component - CVE-2026-8092
Memory safety bugs fixed in Thunderbird ESR 140.10.2 and Thu - CVE-2026-8091
Incorrect boundary conditions in the Audio/Video: Playback c - CVE-2026-8090
Use-after-free in the DOM: Networking component
V. Comments for CVE-2025-1020
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