CVE-2020-25817

Severity Score

4.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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]).

SilverStripe versiones hasta 4.6.0-rc1, presenta una vulnerabilidad de tipo XXE en CSSContentParser. Una utilidad para desarrolladores destinada a analizar HTML dentro de las pruebas unitarias puede ser vulnerable a ataques de tipo XML External Entity (XXE). Cuando esta utilidad para desarrolladores es usada de forma indebida para fines que implican datos externos o enviados por el usuario en el código de proyectos personalizados, puede conllevar a vulnerabilidades de tipo XSS en la salida de HTML renderizada mediante este código personalizado. Esto es mitigado ahora al desactivar las entidades externas durante el análisis sintáctico. (El año correcto del CVE ID es 2020 [CVE-2020-25817, no CVE-2021-25817])

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

Single

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-09-23 CVE Reserved
2021-06-08 CVE Published
2023-09-12 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-611: Improper Restriction of XML External Entity Reference

CAPEC

References (4)

URL	Tag	Source
https://www.silverstripe.org/download/security-releases/cve-2020-25817	Broken Link

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://forum.silverstripe.org/c/releases	2021-06-17
https://www.silverstripe.org/blog/tag/release	2021-06-17
https://www.silverstripe.org/download/security-releases	2021-06-17

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Silverstripe Search vendor "Silverstripe"		Silverstripe Search vendor "Silverstripe" for product "Silverstripe"				< 4.6.0 Search vendor "Silverstripe" for product "Silverstripe" and version " < 4.6.0"		-		Affected
Silverstripe Search vendor "Silverstripe"		Silverstripe Search vendor "Silverstripe" for product "Silverstripe"				4.6.0 Search vendor "Silverstripe" for product "Silverstripe" and version "4.6.0"		rc1		Affected