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CVE-2020-4054— Cross-site Scripting in Sanitize

Quick assessment

Affected
rgrove Sanitize
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.

Sanitize是美国Ryan Grove软件开发者的一款HTML和CSS清理器，它支持从字符串中删除HTML和CSS等。 Sanitize 3.0.0及之后版本（5.2.1版本已修复）中存在跨站脚本漏洞。攻击者可借助特制输入利用该漏洞注入任意的HTML或造成其他危害。

CVSS 7.3 · High EPSS 1.85% · P78

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2020-4054

Vulnerability Information
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Vulnerability Title
Cross-site Scripting in Sanitize
Source: CVE Program / CVE List V5
Vulnerability Description
In Sanitize (RubyGem sanitize) greater than or equal to 3.0.0 and less than 5.2.1, there is a cross-site scripting vulnerability. When HTML is sanitized using Sanitize's "relaxed" config, or a custom config that allows certain elements, some content in a math or svg element may not be sanitized correctly even if math and svg are not in the allowlist. You are likely to be vulnerable to this issue if you use Sanitize's relaxed config or a custom config that allows one or more of the following HTML elements: iframe, math, noembed, noframes, noscript, plaintext, script, style, svg, xmp. Using carefully crafted input, an attacker may be able to sneak arbitrary HTML through Sanitize, potentially resulting in XSS (cross-site scripting) or other undesired behavior when that HTML is rendered in a browser. This has been fixed in 5.2.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Sanitize 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Sanitize是美国Ryan Grove软件开发者的一款HTML和CSS清理器，它支持从字符串中删除HTML和CSS等。 Sanitize 3.0.0及之后版本（5.2.1版本已修复）中存在跨站脚本漏洞。攻击者可借助特制输入利用该漏洞注入任意的HTML或造成其他危害。
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
rgrove Sanitize >= 3.0.0, < 5.2.1 -

II. Public POCs for CVE-2020-4054

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III. Intelligence Information for CVE-2020-4054

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Patches & Fixes for CVE-2020-4054 (1)

Vendor Advisories for CVE-2020-4054 (3)

Other References for CVE-2020-4054 (1)

IV. Related Vulnerabilities

Same product: Sanitize
Same vendor: rgrove
Same weakness: CWE-79

V. Comments for CVE-2020-4054

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