What is CVE-2025-53690?

CVE-2025-53690 is a critical-severity vulnerability in Sitecore Experience Manager (Xm), classified under Deserialization of Untrusted Data. CVSS score: 9.0/10. Published 2025-09-03.

How severe is CVE-2025-53690?

Critical severity. CVSS v3 base score is 9.0 out of 10.

Is CVE-2025-53690 known to be exploited?

Yes. CVE-2025-53690 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-09-04), indicating it is being actively exploited. 11 public proof-of-concept repositories are indexed.

Deserialization in Sitecore Experience Manager (Xm)

CVE-2025-53690

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.

Vulnerability class: Insecure Deserialization

EPSS: 0.052 (90.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H.

Affected products

Sitecore Experience Manager (Xm) — versions 0
Sitecore Experience Platform (Xp) — versions 0

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2025-09-04. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2025-09-25.

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.

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2025-53690?: CVE-2025-53690 is a critical-severity vulnerability in Sitecore Experience Manager (Xm), classified under Deserialization of Untrusted Data. CVSS score: 9.0/10. Published 2025-09-03.
How severe is CVE-2025-53690?: Critical severity. CVSS v3 base score is 9.0 out of 10.
Is CVE-2025-53690 known to be exploited?: Yes. CVE-2025-53690 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-09-04), indicating it is being actively exploited. 11 public proof-of-concept repositories are indexed.