CVE-2020-4054

描述

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.

如何修補 CVE-2020-4054

要修補 CVE-2020-4054,請將受影響套件升級到下列已修補版本。

• —升級至 5.2.1 或更新版本

CVE-2020-4054 正在被利用嗎?

低 — EPSS 為 1.9%,目前沒有觀察到大規模利用活動。

受影響套件(1)

• >= 3.0.0, < 5.2.1

CVSS 分數

參考連結(8)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2020-4054
• PATCHgithub.com/rgrove/sanitize
• WEBgithub.com/rgrove/sanitize/commit/a11498de9e283cd457b35ee252983662f7452aa9
• WEBgithub.com/rgrove/sanitize/releases/tag/v5.2.1