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CVE-2025-13020— Use-after-free in the WebRTC: Audio/Video component

Quick assessment

Affected
Mozilla Firefox
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Mozilla Firefox和Mozilla Firefox ESR都是美国Mozilla基金会的产品。Mozilla Firefox是一款开源Web浏览器。Mozilla Firefox ESR是Firefox(Web浏览器)的一个延长支持版本。 Mozilla Firefox 145之前版本和Mozilla Firefox ESR 140.5之前版本存在安全漏洞，该漏洞源于WebRTC Audio/Video组件存在释放后重用问题。

AI Predicted 8.8 Difficulty: Moderate EPSS 0.29% · P21

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2025-13020

Vulnerability Information
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Vulnerability Title
Use-after-free in the WebRTC: Audio/Video component
Source: CVE Program / CVE List V5
Vulnerability Description
Use-after-free in the WebRTC: Audio/Video component. This vulnerability was fixed in Firefox 145, Firefox ESR 140.5, Thunderbird 145, and Thunderbird 140.5.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Mozilla Firefox和Mozilla Firefox ESR 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mozilla Firefox和Mozilla Firefox ESR都是美国Mozilla基金会的产品。Mozilla Firefox是一款开源Web浏览器。Mozilla Firefox ESR是Firefox(Web浏览器)的一个延长支持版本。 Mozilla Firefox 145之前版本和Mozilla Firefox ESR 140.5之前版本存在安全漏洞，该漏洞源于WebRTC Audio/Video组件存在释放后重用问题。
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 140.5 ~ 140.* -
Mozilla Thunderbird 140.5 ~ 140.* -

II. Public POCs for CVE-2025-13020

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2025-13020

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Vendor Advisories for CVE-2025-13020 (4)

Same Patch Batch · Mozilla · 2025-11-11 · 16 CVEs total

CVE-2025-13027 Memory safety bugs fixed in Firefox 145 and Thunderbird 145
CVE-2025-13019 Same-origin policy bypass in the DOM: Workers component
CVE-2025-13017 Same-origin policy bypass in the DOM: Notifications component
CVE-2025-13018 Mitigation bypass in the DOM: Security component
CVE-2025-13026 Sandbox escape due to incorrect boundary conditions in the Graphics: WebGPU component
CVE-2025-13024 JIT miscompilation in the JavaScript Engine: JIT component
CVE-2025-13025 Incorrect boundary conditions in the Graphics: WebGPU component
CVE-2025-13023 Sandbox escape due to incorrect boundary conditions in the Graphics: WebGPU component
CVE-2025-13016 Incorrect boundary conditions in the JavaScript: WebAssembly component
CVE-2025-13022 Incorrect boundary conditions in the Graphics: WebGPU component
CVE-2025-13015 Spoofing issue in Firefox
CVE-2025-13021 Incorrect boundary conditions in the Graphics: WebGPU component
CVE-2025-13014 Use-after-free in the Audio/Video component
CVE-2025-13013 Mitigation bypass in the DOM: Core & HTML component
CVE-2025-13012 Race condition in the Graphics component

IV. Related Vulnerabilities

Same product: Firefox
Same vendor: Mozilla

V. Comments for CVE-2025-13020

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