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CVE-2020-26951

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。 FireFox 存在跨站脚本漏洞，该漏洞源于SVG代码中的解析和事件加载不匹配可能导致加载事件被触发，即使在清除之后也是如此。 已经能够利用特权内部页面中的XSS漏洞的攻击者可能已经使用此攻击来绕过我们的内置消毒器。

AI Predicted 6.5 Difficulty: Easy EPSS 1.04% · P61

Possible ATT&CK Techniques 1 AI

T1562
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I. Basic Information for CVE-2020-26951

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A parsing and event loading mismatch in Firefox's SVG code could have allowed load events to fire, even after sanitization. An attacker already capable of exploiting an XSS vulnerability in privileged internal pages could have used this attack to bypass our built-in sanitizer. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.
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 跨站脚本漏洞
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。 FireFox 存在跨站脚本漏洞，该漏洞源于SVG代码中的解析和事件加载不匹配可能导致加载事件被触发，即使在清除之后也是如此。 已经能够利用特权内部页面中的XSS漏洞的攻击者可能已经使用此攻击来绕过我们的内置消毒器。
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 < 83 -
Mozilla Firefox ESR < 78.5 -
Mozilla Thunderbird < 78.5 -

II. Public POCs for CVE-2020-26951

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III. Intelligence Information for CVE-2020-26951

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Vendor Advisories for CVE-2020-26951 (3)

Same Patch Batch · Mozilla · 2020-12-09 · 21 CVEs total

CVE-2020-26961 Mozilla Firefox 安全漏洞
CVE-2020-26970 Mozilla Thunderbird 缓冲区错误漏洞
CVE-2020-26969 Mozilla Firefox ESR 缓冲区错误漏洞
CVE-2020-26968 Mozilla Firefox ESR 缓冲区错误漏洞
CVE-2020-26967 Mozilla Firefox 安全漏洞
CVE-2020-26966 Mozilla Firefox 安全漏洞
CVE-2020-26965 Mozilla Firefox 安全漏洞
CVE-2020-26964 Mozilla Firefox for Android 安全漏洞
CVE-2020-26963 Mozilla Firefox 安全漏洞
CVE-2020-26962 Mozilla Firefox 安全漏洞
CVE-2020-26950 Mozilla Firefox 资源管理错误漏洞
CVE-2020-26960 Mozilla Firefox 资源管理错误漏洞
CVE-2020-26959 Mozilla Firefox 资源管理错误漏洞
CVE-2020-26958 Mozilla Firefox ESR 跨站脚本漏洞
CVE-2020-26957 Mozilla Firefox for Android 安全漏洞
CVE-2020-26956 多款Mozilla产品跨站脚本漏洞
CVE-2020-26955 Mozilla Firefox 安全漏洞
CVE-2020-26954 Mozilla Firefox 安全漏洞
CVE-2020-26953 Mozilla Firefox 和 Mozilla Thunderbird 安全漏洞
CVE-2020-26952 Mozilla Firefox 缓冲区错误漏洞

IV. Related Vulnerabilities

Same product: Firefox
Same vendor: Mozilla

V. Comments for CVE-2020-26951

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