CVE-2020-25817: XEE
First published: Tue Jun 08 2021(Updated: )
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]).
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Silverstripe silverstripe | <4.6.0 | |
| Silverstripe silverstripe | =4.6.0-rc1 | |
| composer/silverstripe/framework | >=4.0.0<4.7.4 | 4.7.4 |
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Reference Links
- https://forum.silverstripe.org/c/releases
- https://www.silverstripe.org/blog/tag/release
- https://www.silverstripe.org/download/security-releases/
- https://www.silverstripe.org/download/security-releases/cve-2020-25817
- https://nvd.nist.gov/vuln/detail/CVE-2020-25817
- https://www.silverstripe.org/download/security-releases
- https://www.silverstripe.org/download/security-releases/cve-2021-25817
- https://github.com/advisories/GHSA-3vjc-5x79-m9r8 (Advisory)
Frequently Asked Questions
What is the vulnerability ID?
The vulnerability ID is CVE-2020-25817.
What is the severity of CVE-2020-25817?
The severity of CVE-2020-25817 is medium with a severity value of 4.8.
Which software versions are affected by CVE-2020-25817?
SilverStripe versions up to (but not including) 4.6.0-rc1 are affected by CVE-2020-25817.
What is the Common Weakness Enumeration (CWE) ID for CVE-2020-25817?
The Common Weakness Enumeration (CWE) ID for CVE-2020-25817 is CWE-79 and CWE-611.
How can I fix the XXE Vulnerability in SilverStripe?
To fix the XXE Vulnerability in SilverStripe, it is recommended to update to a version higher than 4.6.0-rc1.
- collector/nvd-index
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- package-manager/composer