CVE-2019-9874

Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability

Severity Score

9.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

Yes

*KEV

Decision

Act

*SSVC

Descriptions

Deserialization of Untrusted Data in the Sitecore.Security.AntiCSRF (aka anti CSRF) module in Sitecore CMS 7.0 to 7.2 and Sitecore XP 7.5 to 8.2 allows an unauthenticated attacker to execute arbitrary code by sending a serialized .NET object in the HTTP POST parameter __CSRFTOKEN.

La deserialización de datos no seguros en el módulo Sitecore.Security.AntiCSRF (conocido como CSRF) en Sitecore CMS versión 7.0 hasta 7.2 y Sitecore XP verisón 7.5 hasta 8.2, permite a un atacante no identificado ejecutar código arbitrario mediante el envío un objeto .NET serializado en el parámetro __CSRFTOKEN como parte del parámetro POST de HTTP.

Sitecore CMS and Experience Platform (XP) contain a deserialization vulnerability in the Sitecore.Security.AntiCSRF module that allows an unauthenticated attacker to execute arbitrary code by sending a serialized .NET object in the HTTP POST parameter __CSRFTOKEN.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:Act

Exploitation

Active

Automatable

Yes

Tech. Impact

Total

* Organization's Worst-case Scenario

Timeline

2019-03-19 CVE Reserved
2019-05-31 CVE Published
2025-03-26 CVE Updated
2025-03-26 Exploited in Wild
2025-03-26 First Exploit
2025-04-15 EPSS Updated
2025-04-16 KEV Due Date

CWE

CWE-502: Deserialization of Untrusted Data

CAPEC

References (3)

URL	Tag	Source
https://www.synacktiv.com/blog.html	Third Party Advisory

URL	Date	SRC
https://www.synacktiv.com/ressources/advisories/Sitecore_CSRF_deserialize_RCE.pdf	2025-03-26

URL	Date	SRC

URL	Date	SRC
https://dev.sitecore.net/Downloads.aspx	2019-06-03

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Sitecore Search vendor "Sitecore"		Cms Search vendor "Sitecore" for product "Cms"				>= 7.0 <= 7.2 Search vendor "Sitecore" for product "Cms" and version " >= 7.0 <= 7.2"		-		Affected
Sitecore Search vendor "Sitecore"		Experience Platform Search vendor "Sitecore" for product "Experience Platform"				>= 7.5 <= 8.2 Search vendor "Sitecore" for product "Experience Platform" and version " >= 7.5 <= 8.2"		-		Affected