CVE-2020-25817
SilverStripe through 4.6.0-rc1 has an XXE Vulnerability in CSSContentParser.
Does this matter?
Lower severity and a low EPSS score (0.82%). Track it; it rarely justifies an emergency change on its own.
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 3.1
- 4.8 MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 0.82% probability · 55th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-611
- Affected
- silverstripe/silverstripe
- Source
- cve@mitre.org
References
- https://forum.silverstripe.org/c/releasesRelease Notes, Vendor Advisory
- https://www.silverstripe.org/blog/tag/releaseRelease Notes, Vendor 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 Notes, Vendor Advisory
- https://www.silverstripe.org/blog/tag/releaseRelease Notes, Vendor Advisory
- https://www.silverstripe.org/download/security-releases/Vendor Advisory
- https://www.silverstripe.org/download/security-releases/cve-2020-25817Broken Link
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.