Home/CVE/Sitecore Multiple Products Deserialization of Untrusted Data Vulnerability
CVE

CVE-2025-53690

Sitecore Multiple Products Deserialization of Untrusted Data Vulnerability

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.

CRITICAL · CVSS 9 ⚠ CISA KEV EPSS 0.05153
Act now
  • Listed on CISA KEV (known exploited in the wild)
  • SSVC exploitation status: active
  • EPSS percentile: top 10% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬢

Required Remediation

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

⬡

Weakness Classification

CWE-502Deserialization of Untrusted Data
▤

Affected Products & Versions

4
sitecore experience commerce<= 9.0
sitecore experience manager<= 9.0
sitecore experience platform<= 9.0
sitecore managed cloudall versions
⚠

Public Exploits & PoCs

1
poccloud.google.com · viewstate-deserialization-zero-day-vulnerabilitycloud.google.com
◈

Detection Rules (IDS/IPS)

1
et-openET HUNTING Sitecore Experience Platform ViewState Insecure Deserialization via Exposed ASP.NET MachineKeys (CVE-2025-53690)web-application-attack
Open rulesets (ET Open, Snort Community, abuse.ch) link to source. Commercial rulesets are reference-only.
▣

Scoring & Timeline

9
CRITICAL · CVSS v3.1 · 9947ef80-c5d5-474a-bbab-97341a59000e
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD03 Sep 2025 · 08:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
active
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

1
cisaKEV-CVE-2025-53690
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-53690US Government Resource
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