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CVE-2025-0237— WebChannel APIs susceptible to confused deputy attack

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是美国Mozilla基金会的一款开源Web浏览器。 Mozilla Firefox 134版本之前存在安全漏洞，该漏洞源于WebChannel API用于跨进程传输各种信息，它没有检查发送主体，而是接受了正在发送的主体。这可能导致特权升级攻击。

AI Predicted 7.8 Difficulty: Easy EPSS 0.62% · P47
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I. Basic Information for CVE-2025-0237

Vulnerability Information
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Vulnerability Title
WebChannel APIs susceptible to confused deputy attack
Source: CVE Program / CVE List V5
Vulnerability Description
The WebChannel API, which is used to transport various information across processes, did not check the sending principal but rather accepted the principal being sent. This could have led to privilege escalation attacks. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.
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 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 134版本之前存在安全漏洞，该漏洞源于WebChannel API用于跨进程传输各种信息，它没有检查发送主体，而是接受了正在发送的主体。这可能导致特权升级攻击。
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 128.6 ~ 128.* -
Mozilla Thunderbird 128.6 ~ 128.* -

II. Public POCs for CVE-2025-0237

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III. Intelligence Information for CVE-2025-0237

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Vendor Advisories for CVE-2025-0237 (4)

Same Patch Batch · Mozilla · 2025-01-07 · 11 CVEs total

CVE-2025-0245 Lock screen setting bypass in Firefox Focus for Android
CVE-2025-0244 Address bar spoofing using an invalid protocol scheme on Firefox for Android
CVE-2025-0239 Alt-Svc ALPN validation failure when redirected
CVE-2025-0246 Address bar spoofing using an invalid protocol scheme on Firefox for Android
CVE-2025-0238 Use-after-free when breaking lines in text
CVE-2025-0241 Memory corruption when using JavaScript Text Segmentation
CVE-2025-0240 Compartment mismatch when parsing JavaScript JSON module
CVE-2025-0243 Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 128.6, and Thunderbi
CVE-2025-0242 Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 115.19, Firefox ESR
CVE-2025-0247 Memory safety bugs fixed in Firefox 134 and Thunderbird 134

IV. Related Vulnerabilities

Same product: Firefox
Same vendor: Mozilla

V. Comments for CVE-2025-0237

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