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silverstripeCMS Improper Restriction of XML External Entity Reference Vulnerability - CVE-2020-25817 - Vulnerability Database
silverstripeCMS

silverstripeCMS Improper Restriction of XML External Entity Reference Vulnerability - CVE-2020-25817

Medium
Reference: CVE-2020-25817
NVD Link: https://nvd.nist.gov/vuln/detail/CVE-2020-25817
Title: silverstripeCMS Improper Restriction of XML External Entity Reference Vulnerability
Overview:

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).