CVE-2020-25817: SilverStripe XXE Vulnerability in… – CVSS 4.8 · Watchpost

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SilverStripe XXE Vulnerability in CSSContentParser

中 4.8CVE-2020-25817 · BIT-silverstripe-2020-25817 · GHSA-3vjc-5x79-m9r8 · 08/06/2021 公開 · 17/06/2026 更新

要点

CVE-2020-25817 は silverstripe/framework, silverstripe (silverstripe) に影響する深刻度「中」 (CVSS 4.8) の脆弱性です。
今後30日間に悪用される確率（EPSS）：0.82%（全脆弱性の 57.3% より高い）。
対処：4.7.4, 4.6.0 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
silverstripe/framework Packagist	`≥ 4.0.0, < 4.7.4`	`4.7.4`
silverstripe silverstripe	`= 4.6.0< 4.6.0`	`4.6.0`

概要

SilverStripe through 4.6.0-rc1 has an XXE Vulnerability in CSSContentParser. A developer utility meant for parsing HTML within unit tests can be vulnerable to XML External Entity (XXE) attacks. When this developer utility is misused for purposes involving external or user submitted data in custom project code, it can lead to vulnerabilities such as XSS on HTML output rendered through this custom code. This is now mitigated by disabling external entities during parsing. (The correct CVE ID year is 2020 [CVE-2020-25817, not CVE-2021-25817]).

NVD の説明

SilverStripe through 4.6.0-rc1 has an XXE Vulnerability in CSSContentParser. A developer utility meant for parsing HTML within unit tests can be vulnerable to XML External Entity (XXE) attacks. When this developer utility is misused for purposes involving external or user submitted data in custom project code, it can lead to vulnerabilities such as XSS on HTML output rendered through this custom code. This is now mitigated by disabling external entities during parsing. (The correct CVE ID year is 2020 [CVE-2020-25817, not CVE-2021-25817]).

参考情報

nvd.nist.gov/vuln/detail/CVE-2020-25817 · ADVISORY
forum.silverstripe.org/c/releases · WEB
silverstripe/silverstripe-framework · PACKAGE
silverstripe.org/blog/tag/release · WEB
silverstripe.org/download/security-releases · WEB
silverstripe.org/download/security-releases/cve-2021-25817 · WEB
silverstripe.org/download/security-releases · Vendor Advisory
silverstripe.org/download/security-releases/cve-2020-25817 · Broken Link

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