DOMPurify allows tampering by prototype pollution

中 6.1CVE-2024-45801 · GHSA-mmhx-hmjr-r674 · 16/09/2024 公開 · 17/06/2026 更新

要点

CVE-2024-45801 は dompurify (cure53), dompurify に影響する深刻度「中」 (CVSS 6.1) の脆弱性です。
今後30日間に悪用される確率（EPSS）：0.89%（全脆弱性の 59.5% より高い）。
対処：3.1.3, 2.5.4 以降に更新してください。

パッケージ	影響を受けるバージョン	修正済みバージョン
dompurify cure53	`≥ 3.0.0, < 3.1.3< 2.5.4`	`3.1.32.5.4`
dompurify npm	`≥ 3.0.0, < 3.1.3< 2.5.4`	`3.1.32.5.4`

概要

It has been discovered that malicious HTML using special nesting techniques can bypass the depth checking added to DOMPurify in recent releases. It was also possible to use Prototype Pollution to weaken the depth check.

This renders dompurify unable to avoid XSS attack.

Fixed by https://github.com/cure53/DOMPurify/commit/1e520262bf4c66b5efda49e2316d6d1246ca7b21 (3.x branch) and https://github.com/cure53/DOMPurify/commit/26e1d69ca7f769f5c558619d644d90dd8bf26ebc (2.x branch).

NVD の説明

DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. It has been discovered that malicious HTML using special nesting techniques can bypass the depth checking added to DOMPurify in recent releases. It was also possible to use Prototype Pollution to weaken the depth check. This renders dompurify unable to avoid cross site scripting (XSS) attacks. This issue has been addressed in versions 2.5.4 and 3.1.3 of DOMPurify. All users are advised to upgrade. There are no known workarounds for this vulnerability.