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Servers and applications

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…

Severity
Medium 4.8
Published
8 Jun 2021
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
4.6.0
Sources
NVD

Affected software

SoftwareAffected versions
Silverstripe CMSServers and applications · cpe:a:silverstripe:silverstripe
  • Every version before 4.6.0
  • Version 4.6.0-rc1

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2020-25817
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2020-25817