CVE Vulnerability

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 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]).

3.5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 6.8 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

Scope

4.8 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.7 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References
Link Resource
https://www.silverstripe.org/download/security-releases/ Vendor Advisory
https://www.silverstripe.org/blog/tag/release Release Notes Vendor Advisory
https://forum.silverstripe.org/c/releases Release Notes Vendor Advisory
https://www.silverstripe.org/download/security-releases/cve-2020-25817 Broken Link
Configurations

Configuration 1

cpe:2.3:a:silverstripe:silverstripe:4.6.0:rc1:*:*:*:*:*:*
cpe:2.3:a:silverstripe:silverstripe:*:*:*:*:*:*:*:*
Information

Published : 2021-06-08 06:15

Updated : 2021-06-17 03:47

NVD link : CVE-2020-25817

Mitre link : CVE-2020-25817

Products Affected
No products.
CWE
CWE-611

Improper Restriction of XML External Entity Reference