CVEvulnerability
CVE-2020-25817
4.8 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2021-06-08
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 4.8 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
- CVSS 2.0 ([email protected])
- 3.5 LOW — AV:N/AC:M/Au:S/C:N/I:P/A:N
- Weaknesses
- CWE-611
Description
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 configurations
• silverstripe silverstripe (< 4.6.0)
• silverstripe silverstripe 4.6.0
Related
Weakness · CWE (1)
- CWE-611 Improper Restriction of XML External Entity Reference weakness
References
- https://forum.silverstripe.org/c/releases Release Notes, Vendor Advisory
- https://www.silverstripe.org/blog/tag/release Release Notes, Vendor Advisory
- https://www.silverstripe.org/download/security-releases/ Vendor Advisory
- https://www.silverstripe.org/download/security-releases/cve-2020-25817 Broken Link
- https://forum.silverstripe.org/c/releases Release Notes, Vendor Advisory
- https://www.silverstripe.org/blog/tag/release Release Notes, Vendor Advisory
- https://www.silverstripe.org/download/security-releases/ Vendor Advisory
- https://www.silverstripe.org/download/security-releases/cve-2020-25817 Broken Link