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CVE-2021-23986

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 存在访问控制错误漏洞，目前尚无此漏洞的相关信息，请随时关注CNNVD或厂商公告。

AI Predicted 4.3 Difficulty: Moderate EPSS 0.44% · P36

Possible ATT&CK Techniques 1 AI

T1005 · Data from Local System
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I. Basic Information for CVE-2021-23986

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A malicious extension with the 'search' permission could have installed a new search engine whose favicon referenced a cross-origin URL. The response to this cross-origin request could have been read by the extension, allowing a same-origin policy bypass by the extension, which should not have cross-origin permissions. This cross-origin request was made without cookies, so the sensitive information disclosed by the violation was limited to local-network resources or resources that perform IP-based authentication. This vulnerability affects Firefox < 87.
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 访问控制错误漏洞
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 存在访问控制错误漏洞，目前尚无此漏洞的相关信息，请随时关注CNNVD或厂商公告。
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 unspecified ~ 87 -

II. Public POCs for CVE-2021-23986

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III. Intelligence Information for CVE-2021-23986

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Vendor Advisories for CVE-2021-23986 (2)

Same Patch Batch · Mozilla · 2021-03-31 · 8 CVEs total

CVE-2021-23981 Mozilla Firefox 缓冲区错误漏洞
CVE-2021-23982 Mozilla Firefox 加密问题漏洞
CVE-2021-23983 Mozilla Firefox 缓冲区错误漏洞
CVE-2021-23984 Mozilla Firefox 安全漏洞
CVE-2021-23985 Mozilla Firefox 安全漏洞
CVE-2021-23987 Mozilla Firefox 缓冲区错误漏洞
CVE-2021-23988 Mozilla Firefox 缓冲区错误漏洞

IV. Related Vulnerabilities

Same product: Firefox
Same vendor: Mozilla

V. Comments for CVE-2021-23986

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