CVE-2020-25817: 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…

PriorityP421medium4.8CVSS 3.1

AVNACLPRHUIRSCCLILAN

EPSS

0.82%

52.6th percentile

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]).

Affected

3 ranges

Vendor	Product	Version range	Fixed in
silverstripe	framework	>= 4.0.0 < 4.7.4	4.7.4
silverstripe	silverstripe	< 4.6.0	4.6.0
silverstripe	silverstripe	—	—

CVSS provenance

nvdv3.14.8MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

nvdv2.03.5LOWAV:N/AC:M/Au:S/C:N/I:P/A:N

ghsa4.8MEDIUM

osv4.8MEDIUM

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