ClosedCriticalPatched

Sitecore Multiple Products: Multiple Products Deserialization of Untrusted Data Vulnerability

Sitecore Multiple Products

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. Added to CISA KEV on 2025-09-04.

Why this severity: CVSS 9.0 (CNA, v3.1); actively exploited (CISA KEV)

Started: Sep 4, 2025
Closed: Sep 4, 2025
CVE: CVE-2025-53690

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Updated Sep 4, 2025

Affected

See vendor advisory / CISA notes (versions not always listed in KEV feed)

Fixed in

See vendor advisory linked in sources

Timeline1

Sep 4, 2025
CISA added CVE-2025-53690 to the KEV catalog (due 2025-09-25).

Advisories3

Notes & caveats

Derived from CISA KEV JSON feed catalogVersion 2026.10.21. CVSS from the CVE record (cvelistV5). Exact affected/fixed version strings are not always in the KEV record; verify against the vendor advisory URL. startedAt uses dateAdded (exploitation may have begun earlier; many entries are older CVEs newly confirmed as exploited in 2025).

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