CVE-2025-53691

Sitecore Experience Remote Code Execution through Insecure Deserialization

HIGH
8.8
CVSS Score
Published: September 3, 2025 at 12:36 PM UTC
Updated: October 18, 2026 at 09:10 PM UTC
4 products affected across 1 vendorExperience PlatformExperience ManagerManaged Cloud

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Severity
HIGH8.8
Exploit prediction
EPSS 2%
SSVC
PoC

Description

Deserialization of Untrusted Data vulnerability in Sitecore Experience Manager (XM), Sitecore Experience Platform (XP) allows Remote Code Execution (RCE).This issue affects Experience Manager (XM): from 9.0 through 9.3, from 10.0 through 10.4; Experience Platform (XP): from 9.0 through 9.3, from 10.0 through 10.4.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

9.0 ≤ v ≤ 10.4
9.0 ≤ v < 10.410.010.49.0
Affected range stops below 10.4, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (2)

ExploitThird Party Advisory
Source: 9947ef80-c5d5-474a-bbab-97341a59000e
https://labs.watchtowr.com/cache-me-if-you-can-sitecore-experience-platform-cache-poisoning-to-rce/
Vendor Advisory
Source: 9947ef80-c5d5-474a-bbab-97341a59000e
https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1003667

SSVC — Action Prioritization

SSVCPoCNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHWiz
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-502

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