CVE-2025-53690

Sitecore Products ViewState Deserialization Vulnerability

9.0 CriticalIn KEVPublic exploit

Deserialization of Untrusted Data vulnerability in Sitecore Experience Manager (XM), Sitecore Experience Platform (XP) allows Code Injection.This issue affects Experience Manager (XM): through 9.0; Experience Platform (XP): through 9.0.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

60.7%Up 60.7 points since Sep 4, 2025

What each source reports

CVE List Score used 9.0

Sitecore Products ViewState Deserialization Vulnerability

Record: CVE-2025-53690
CVSS 3.1: 9.0 CriticalCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness: CWE-502
Updated: 2026-11-02

EUVDEUVD-2025-26629 9.0

Record: EUVD-2025-26629
CVSS 3.1: 9.0 CriticalCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-g5r9-cgwv-wmpc 9.0

Deserialization of Untrusted Data vulnerability in Sitecore Experience Manager (XM), Sitecore...

Record: GHSA-g5r9-cgwv-wmpc
CVSS 3.1: 9.0 CriticalCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness: CWE-502
Updated: 2026-11-02

CISA KEV No score

Sitecore Multiple Products Deserialization of Untrusted Data Vulnerability

Sitecore Experience Manager (XM), Experience Platform (XP), Experience Commerce (XC), and Managed Cloud contain a deserialization of untrusted data vulnerability involving the use of default machine keys. This flaw allows attackers to exploit exposed ASP.NET machine keys to achieve remote code execution.

Record: CVE-2025-53690
Weakness: CWE-502
Updated: 2026-11-02

NVD 9.0

Record: CVE-2025-53690
CVSS 3.1: 9.0 CriticalCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness: CWE-502
Updated: 2026-11-02

Affected products

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
PoC in GitHub	rxerium/CVE-2025-53690	2025-09-04
PoC in GitHub	m0d0ri205/CVE-2025-53690-Analysis	2025-09-07
PoC in GitHub	ErikLearningSec/CVE-2025-53690-POC	2025-11-05

History

History
Recorded	Changed	Sources
Nov 3, 2026	exploitation, exploits
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, CISA KEV, NVD, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-53690 is a critical vulnerability (CVSS 9.0) in Sitecore Experience Manager (xm), published September 3, 2025. CISA lists it as known to be exploited, since September 4, 2025. EUVD reports exploitation since September 4, 2025. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 60.7%, the 99th percentile. No source names a fixed version.