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CVE-2025-11720— Spoofing risk in Android custom tabs

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 Focus都是美国Mozilla基金会的产品。Mozilla Firefox是一款开源Web浏览器。Mozilla Firefox Focus是一个供iOS设备专用的浏览器。 Mozilla Firefox和Mozilla Firefox Focus 144之前版本存在安全漏洞，该漏洞源于Android自定义标签功能仅显示加载的站点而非完整主机名，可能导致用户误判子域名内容来源。

AI Predicted 5.9 Difficulty: Easy EPSS 0.25% · P16

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts
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I. Basic Information for CVE-2025-11720

Vulnerability Information
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Vulnerability Title
Spoofing risk in Android custom tabs
Source: CVE Program / CVE List V5
Vulnerability Description
The Firefox and Firefox Focus UI for the Android custom tab feature only showed the "site" that was loaded, not the full hostname. User supplied content hosted on a subdomain of a site could have been used to fool a user into thinking it was content from a different subdomain of that site. This vulnerability was fixed in Firefox 144.
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 Focus 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mozilla Firefox和Mozilla Firefox Focus都是美国Mozilla基金会的产品。Mozilla Firefox是一款开源Web浏览器。Mozilla Firefox Focus是一个供iOS设备专用的浏览器。 Mozilla Firefox和Mozilla Firefox Focus 144之前版本存在安全漏洞，该漏洞源于Android自定义标签功能仅显示加载的站点而非完整主机名，可能导致用户误判子域名内容来源。
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 144 ~ * -

II. Public POCs for CVE-2025-11720

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III. Intelligence Information for CVE-2025-11720

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Vendor Advisories for CVE-2025-11720 (1)

Same Patch Batch · Mozilla · 2025-10-14 · 14 CVEs total

CVE-2025-11711 Some non-writable Object properties could be modified
CVE-2025-11710 Cross-process information leaked due to malicious IPC messages
CVE-2025-11709 Out of bounds read/write in a privileged process triggered by WebGL textures
CVE-2025-11714 Memory safety bugs fixed in Firefox ESR 115.29, Firefox ESR 140.4, Thunderbird ESR 140.4,
CVE-2025-11708 Use-after-free in MediaTrackGraphImpl::GetInstance()
CVE-2025-11715 Memory safety bugs fixed in Firefox ESR 140.4, Thunderbird ESR 140.4, Firefox 144 and Thun
CVE-2025-11712 An OBJECT tag type attribute overrode browser behavior on web resources without a content-
CVE-2025-11713 Potential user-assisted code execution in “Copy as cURL” command
CVE-2025-11721 Memory safety bug fixed in Firefox 144 and Thunderbird 144
CVE-2025-11719 Use-after-free caused by the native messaging web extension API on Windows
CVE-2025-11716 Sandboxed iframes allowed links to open in external apps (Android only)
CVE-2025-11717 The password edit screen was not hidden in Android card view
CVE-2025-11718 Address bar could be spoofed on Android using visibilitychange

IV. Related Vulnerabilities

Same product: Firefox
Same vendor: Mozilla

V. Comments for CVE-2025-11720

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