VDB-135779 · CVE-2019-9874 · GCVE-0-2019-9874

Sitecore CMS/XP Sitecore.Security.AntiCSRF __CSRFTOKEN deserialization

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.5	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Sitecore CMS and XP. It has been rated as critical. The affected element is an unknown function of the component Sitecore.Security.AntiCSRF. The manipulation of the argument __CSRFTOKEN as part of POST Parameter leads to deserialization. This vulnerability is traded as CVE-2019-9874. It is possible to initiate the attack remotely. Furthermore, there is an exploit available.

Detailsinfo

A vulnerability was found in Sitecore CMS and XP (Content Management System) (version unknown) and classified as critical. This issue affects an unknown function of the component Sitecore.Security.AntiCSRF. The manipulation of the argument __CSRFTOKEN as part of a POST Parameter leads to a deserialization vulnerability. Using CWE to declare the problem leads to CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was shared 05/31/2019. The identification of this vulnerability is CVE-2019-9874 since 03/19/2019. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details as well as a exploit are known.

It is declared as attacked. The CISA Known Exploited Vulnerabilities Catalog lists this issue since 03/26/2025 with a due date of 04/16/2025:

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Content Management System

Vendor

Sitecore

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.5

VulDB Base Score: 7.3
VulDB Temp Score: 7.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Deserialization
CWE: CWE-502 / CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Attacked

EPSS Score: 🔍
EPSS Percentile: 🔍

KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍
KEV Notice: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/19/2019 🔍
05/31/2019 +73 days 🔍
06/01/2019 +1 days 🔍
03/27/2025 +2126 days 🔍

Sourcesinfo

Advisory: synacktiv.com
Status: Confirmed

CVE: CVE-2019-9874 (🔍)
GCVE (CVE): GCVE-0-2019-9874
GCVE (VulDB): GCVE-100-135779
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 06/01/2019 08:14
Updated: 03/27/2025 03:54
Changes: 06/01/2019 08:14 (37), 06/17/2020 16:41 (18), 09/25/2023 14:55 (3), 09/25/2023 14:58 (1), 03/26/2025 20:33 (15), 03/27/2025 03:54 (15)
Complete: 🔍
Cache ID: 216::103