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CVE-2021-23953

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 85.0版本之前存在安全漏洞。该漏洞源于如果用户单击特制的PDF，则在将PDF阅读器用作分块数据时，它可能会混淆泄漏跨域信息。

AI Predicted 4.3 Difficulty: Easy EPSS 1.05% · P61

Possible ATT&CK Techniques 1 AI

T1213 · Data from Information Repositories
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I. Basic Information for CVE-2021-23953

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
If a user clicked into a specifically crafted PDF, the PDF reader could be confused into leaking cross-origin information, when said information is served as chunked data. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7.
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 85.0版本之前存在安全漏洞。该漏洞源于如果用户单击特制的PDF，则在将PDF阅读器用作分块数据时，它可能会混淆泄漏跨域信息。
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 < 85 -
Mozilla Thunderbird < 78.7 -
Mozilla Firefox ESR < 78.7 -

II. Public POCs for CVE-2021-23953

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III. Intelligence Information for CVE-2021-23953

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Vendor Advisories for CVE-2021-23953 (3)

Same Patch Batch · Mozilla · 2021-02-26 · 25 CVEs total

CVE-2021-23960 Mozilla Firefox 安全漏洞
CVE-2021-23976 Mozilla Firefox 安全漏洞
CVE-2021-23975 Mozilla Firefox 安全漏洞
CVE-2021-23974 Mozilla Firefox 安全漏洞
CVE-2021-23973 Mozilla Thunderbird 安全漏洞
CVE-2021-23972 Mozilla Firefox 安全漏洞
CVE-2021-23971 Mozilla Firefox 安全漏洞
CVE-2021-23970 Mozilla Firefox 安全漏洞
CVE-2021-23969 Mozilla Thunderbird 安全漏洞
CVE-2021-23968 Mozilla Thunderbird 安全漏洞
CVE-2021-23962 Mozilla Firefox 安全漏洞
CVE-2021-23961 Mozilla Firefox 安全漏洞
CVE-2021-23964 Mozilla Firefox 缓冲区错误漏洞
CVE-2021-23959 Mozilla Firefox 跨站脚本漏洞
CVE-2021-23958 Mozilla Firefox 信息泄露漏洞
CVE-2021-23957 Mozilla Firefox 安全漏洞
CVE-2021-23956 Mozilla Firefox 安全漏洞
CVE-2021-23955 Mozilla Firefox 安全漏洞
CVE-2021-23954 Mozilla Firefox 安全漏洞
CVE-2021-23963 Mozilla Firefox 安全漏洞

Showing top 20 of 25 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Firefox
Same vendor: Mozilla

V. Comments for CVE-2021-23953

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