CVEs / CVE-2025-53690
CVE-2025-53690: Sitecore Multiple Products Deserialization of Untrusted Data Vulnerability
- Known exploited in the CISA KEV catalog since 4 Sep 2025
- critical 9 CVSS 3.1 (from the CNA)
- EPSS 60.6% chance of exploitation in the next 30 days, higher than 99% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
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.
Description
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Sitecore Experience Manager (XM) | up to and including 9.0 | — |
| Sitecore Experience Platform (XP) | up to and including 9.0 | — |
Exploitation
| In CISA KEV since | 4 Sep 2025 |
|---|---|
| Due date for US federal agencies | 25 Sep 2025 |
| Used in ransomware campaigns | Unknown |
| 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. |
Severity
| CVSS 3.1 | 9 criticalCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:HScored by the CNA (9947ef80-c5d5-474a-bbab-97341a59000e) |
|---|---|
| Weakness | CWE-502 |
References
- CVE-2025-53690 on NVD
- CVE-2025-53690 in the CISA KEV catalog
- https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1003865 (cited by CISA)
- https://cloud.google.com/blog/topics/threat-intelligence/viewstate-deserialization-zero-day-vulnerability Exploit, Third Party Advisory
- https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1003865 Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-53690 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.