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Back to active CVEs
Critical · CVSS 9.0Known ExploitedCVE-2025-53690

Sitecore Products ViewState Deserialization VulnerabilityCVE-2025-53690

Answer in brief

CVE-2025-53690 records a Critical severity (CVSS 9.0) vulnerability in Sitecore Products ViewState Deserialization Vulnerability. The current sources mark it as known exploited. The current feed maps Sitecore/Experience Manager (XM) (generic), Sitecore/Experience Manager (XM) (generic), Sitecore/Experience Platform (XP) (generic), Sitecore/Experience Platform (XP) (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 3, 2025Updated Oct 18, 2026Source checked Nov 3, 2026First seen by HOL May 24, 2026Material review Oct 18, 2026
Upstream Advisory

Key facts

Risk
Critical · CVSS 9.0
Exploitation
Known exploited
Affected software
8 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 9.0. Known-exploitation status makes exposure review time-sensitive. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Sitecore/Experience Manager (XM) (generic), Sitecore/Experience Manager (XM) (generic), Sitecore/Experience Platform (XP) (generic), Sitecore/Experience Platform (XP) (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
ProductAffected versionsFixed versions
cpe:2.3:a:sitecore:experience_commerce:*:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:a:sitecore:experience_manager:*:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:a:sitecore:experience_platform:*:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:a:sitecore:managed_cloud:-:*:*:*:*:*:*:*Not reportedNot reported
Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Sitecore/Experience Manager (XM)generic>=0 <=9.0Not reported
Sitecore/Experience Manager (XM)generic0Not reported
Sitecore/Experience Platform (XP)generic>=0 <=9.0Not reported
Sitecore/Experience Platform (XP)generic0Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Sitecore/Experience Manager (XM), Sitecore/Experience Manager (XM), Sitecore/Experience Platform (XP).
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Sep 3, 2025

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 18, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    May 24, 2026

  4. Added to CISA KEV

    Sep 4, 2025

    Evidence: source:kev:kev:kev:record

Sources and claim methodology

  • Source referencecloud.google.com
  • Source referencesupport.sitecore.com
  • CISA Known Exploited Vulnerabilities catalogcisa.gov
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Stanza: RCE via pickle deserialization in the lemmatizerAlso CWE-502

Record context

Vulnerability class
Deserialization
EPSS
Not reported
CWE IDs
CWE-502
Source
CVE List V5
Source checked
Nov 3, 2026
References
3 linked sources
Open source record