CVE-2019-9874

CRITICAL(9.8)KEVLikely Exploited

Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability

Description

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.

KEV Information

Vendor
Sitecore
Product
CMS and Experience Platform (XP)
Date Added
March 26, 2025
Due Date
April 16, 2025
Required Action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

CVSS Score

Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HOpen in Calculator
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9

CWEs

CWE-502Insecure Deserialization

Deserialization of Untrusted Data

Affected Products

VendorProductVersion
sitecorecms>= 7.0, <= 7.2
sitecoreexperience platform>= 7.5, <= 8.2

Multiple CVSS Assessments

Source: [email protected](Primary)
9.8
CRITICAL

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

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0(Secondary)
9.8
CRITICAL

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

References

CVSS Score

9.8
CRITICAL(9.8)

EPSS Score

EPSS Score83.86%
EPSS Percentile99.7%

Dates

PublishedMay 31, 2019
Last ModifiedJune 17, 2026
StatusAnalyzed
CVSS Versionv3.1

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