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CVE-2025-11711— Some non-writable Object properties could be modified

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 Thunderbird都是美国Mozilla基金会的产品。Mozilla Firefox是一款开源Web浏览器。Mozilla Thunderbird是一套从Mozilla Application Suite独立出来的电子邮件客户端软件。该软件支持IMAP、POP邮件协议以及HTML邮件格式。 Mozilla Firefox和Mozilla Thunderbird存在安全漏洞，该漏洞源于可更改不可写JavaScript对象属性值。以下产品及版本受到影响：Fi

AI Predicted 5.3 Difficulty: Hard EPSS 0.21% · P12

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2025-11711

Vulnerability Information
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Vulnerability Title
Some non-writable Object properties could be modified
Source: CVE Program / CVE List V5
Vulnerability Description
There was a way to change the value of JavaScript Object properties that were supposed to be non-writeable. This vulnerability was fixed in Firefox 144, Firefox ESR 115.29, Firefox ESR 140.4, Thunderbird 144, and Thunderbird 140.4.
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 Thunderbird 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mozilla Firefox和Mozilla Thunderbird都是美国Mozilla基金会的产品。Mozilla Firefox是一款开源Web浏览器。Mozilla Thunderbird是一套从Mozilla Application Suite独立出来的电子邮件客户端软件。该软件支持IMAP、POP邮件协议以及HTML邮件格式。 Mozilla Firefox和Mozilla Thunderbird存在安全漏洞，该漏洞源于可更改不可写JavaScript对象属性值。以下产品及版本受到影响：Fi
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 115.29 ~ 115.* -
Mozilla Thunderbird 140.4 ~ 140.* -

II. Public POCs for CVE-2025-11711

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III. Intelligence Information for CVE-2025-11711

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Vendor Advisories for CVE-2025-11711 (5)

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

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-2025-11720 Spoofing risk in Android custom tabs
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-2025-11711

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