CVE-2020-25817 - CVE House

Back to Database

Status published Medium CVE-2020-25817

SilverStripe through 4.6.0-rc1 has an XXE Vulnerability in CSSContentParser. A...

4.8 CVSS

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]).

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2020-25817

Check My Exposure

Credits & Attribution

No credits recorded in the NVD database.

References

More from silverstripe

View All →

Silverstripe Framework has a XSS vulnerability in HTML editor

Silverstripe Elemental enables XSS attacks in elemental "Content blocks in use" reports

Cross-site Scripting in form messages in silverstripe framework

Cross-site Scripting via insert media remote file oembed in silverstripe-asset-admin

Cross-site Scripting vulnerability with encoded payload in silverstripe/framework

Affected Vendor

silverstripe

View all reports →

Affected Software

silverstripe

Vulnerable Versions:

0, 4.6.0

Timeline

Official Publish: June 8th, 2021

Last Modified: August 4th, 2024

Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.