Vulnerability 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]).
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Silverstripe | Silverstripe | < 4.6.0 |
Related Weaknesses (CWE)
References
- https://forum.silverstripe.org/c/releasesRelease NotesVendor Advisory
- https://www.silverstripe.org/blog/tag/releaseRelease NotesVendor Advisory
- https://www.silverstripe.org/download/security-releases/Vendor Advisory
- https://www.silverstripe.org/download/security-releases/cve-2020-25817Broken Link
- https://forum.silverstripe.org/c/releasesRelease NotesVendor Advisory
- https://www.silverstripe.org/blog/tag/releaseRelease NotesVendor Advisory
- https://www.silverstripe.org/download/security-releases/Vendor Advisory
- https://www.silverstripe.org/download/security-releases/cve-2020-25817Broken Link
FAQ
What is CVE-2020-25817?
CVE-2020-25817 is a vulnerability with a CVSS score of 4.8 (MEDIUM). 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 t...
How severe is CVE-2020-25817?
CVE-2020-25817 has been rated MEDIUM with a CVSS base score of 4.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-25817?
Check the references section above for vendor advisories and patch information. Affected products include: Silverstripe Silverstripe.