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CVE-2021-23984

Quick assessment

Affected
Mozilla Firefox ESR
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 存在安全漏洞，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 5.3 Difficulty: Easy EPSS 1.11% · P63

Possible ATT&CK Techniques 1 AI

T1553 · Subvert Trust Controls
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I. Basic Information for CVE-2021-23984

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A malicious extension could have opened a popup window lacking an address bar. The title of the popup lacking an address bar should not be fully controllable, but in this situation was. This could have been used to spoof a website and attempt to trick the user into providing credentials. This vulnerability affects Firefox ESR < 78.9, Firefox < 87, and Thunderbird < 78.9.
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 存在安全漏洞，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 ESR unspecified ~ 78.9 -
Mozilla Firefox unspecified ~ 87 -
Mozilla Thunderbird unspecified ~ 78.9 -

II. Public POCs for CVE-2021-23984

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III. Intelligence Information for CVE-2021-23984

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Vendor Advisories for CVE-2021-23984 (4)

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-2021-23985 Mozilla Firefox 安全漏洞
CVE-2021-23986 Mozilla Firefox 访问控制错误漏洞
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 ESR
Same vendor: Mozilla

V. Comments for CVE-2021-23984

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