VDB-135780 · CVE-2019-9875 · GCVE-0-2019-9875

Sitecore CMS up to 9.1 CSRF POST Parameter 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.
7.5	$0-$5k	0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Sitecore CMS up to 9.1. The impacted element is an unknown function of the component CSRF Module. The manipulation as part of POST Parameter results in deserialization. This vulnerability is known as CVE-2019-9875. It is possible to launch the attack remotely. Furthermore, an exploit is available.

Detailsinfo

A vulnerability was found in Sitecore CMS up to 9.1 (Content Management System). It has been classified as critical. Affected is an unknown functionality of the component CSRF Module. The manipulation as part of a POST Parameter leads to a deserialization vulnerability. CWE is classifying the issue as CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Deserialization of Untrusted Data in the anti CSRF module in Sitecore through 9.1 allows an authenticated attacker to execute arbitrary code by sending a serialized .NET object in an HTTP POST parameter.

The weakness was published 05/31/2019. This vulnerability is traded as CVE-2019-9875 since 03/19/2019. It is possible to launch the attack remotely. The successful exploitation needs a authentication. Technical details are unknown but an exploit is available.

It is declared as attacked. This issue was added on 03/26/2025 to the CISA Known Exploited Vulnerabilities Catalog 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.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Content Management System

Vendor

Sitecore

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.6

VulDB Base Score: 6.3
VulDB Temp Score: 6.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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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: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

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-2019-9875 (🔍)
GCVE (CVE): GCVE-0-2019-9875
GCVE (VulDB): GCVE-100-135780
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 16:45 (18), 09/25/2023 15:02 (3), 09/25/2023 15:04 (1), 03/26/2025 20:33 (15), 03/27/2025 03:54 (15)
Complete: 🔍
Cache ID: 216::103