CVE-2025-53690
Sitecore Products ViewState Deserialization Vulnerability
CVSS Score
9.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-502 |
| Vendor | sitecore |
| Product | experience manager (xm) |
| Published | Sep 3, 2025 |
| Last Updated | Feb 26, 2026 |
⚠️ Actively Exploited — Act Now
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
Sitecore / Experience Manager (XM)
0 ≤ 9.0
Sitecore / Experience Platform (XP)
0 ≤ 9.0
References
cloud.google.com: https://cloud.google.com/blog/topics/threat-intelligence/viewstate-deserialization-zero-day-vulnerability support.sitecore.com: https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1003865 cisa.gov: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-53690
Credits
Mandiant Threat Defense