CVE-2019-9875Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability

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.

8.8 HIGHEPSS 25.43%⚡ Known Exploited (CISA KEV)NVD: Analyzed

Last updated: 2026-06-17 02:44 UTC

OverviewCVSS details

8.8HIGHCVSS 3.1

Score source: NVD
NVD status: Analyzed
Published: May 31, 2019
Assigner: mitre

Affected

cms (sitecore)

Versions: through 9.1

Exploitation

Public exploit: Yes · 1 reference
CISA KEV: Listed · Mar 26, 2025
KEV due date: Apr 16, 2025
Ransomware use: Unknown
SSVC: Exploitation active · Automatable no · Impact total

EPSS · FIRST, scored Nov 7

25.43%chance of exploitation in 30 days

Higher than 97.96% of CVEs

CVSS 3.1 · NVD

8.8High

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

Attack vector: Network
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

CVSS 2.0 · NVD

6.5Medium

AV:N/AC:L/Au:S/C:P/I:P/A:P

Attack vector: Network
Attack complexity: Low
Authentication: Single
Confidentiality impact: Partial
Integrity impact: Partial
Availability impact: Partial

NVD status: Analyzed

Overview Affected Products References

NVD CVE.org

Overview

Severity

Score	Severity	Version	Vector String
8.8	HIGH	3.1NVD	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.5	MEDIUM	2.0NVD	AV:N/AC:L/Au:S/C:P/I:P/A:P

CISA required action

⚡ Known exploited · remediation due Apr 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.

Details

CVE ID: CVE-2019-9875
Status: Analyzed
Assigner (CNA): mitre
Published: May 31, 2019
Last modified: 2026-06-17 02:44 UTC
Weaknesses: CWE-502

Sources

Refreshed hourly from the sources above. Last fetched 2026-11-08 12:01 UTC.