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PatchSiren cyber security CVE debrief

CVE-2025-53690 Sitecore CVE debrief

CVE-2025-53690 is a Sitecore deserialization of untrusted data vulnerability affecting multiple products. CISA added it to the Known Exploited Vulnerabilities catalog on 2025-09-04 and set a remediation due date of 2025-09-25, so organizations running Sitecore should treat it as an urgent remediation item and follow vendor mitigation guidance.

Vendor
Sitecore
Product
Multiple Products
CVSS
CRITICAL 9
CISA KEV
Listed
Original CVE published
2025-09-04
Original CVE updated
2025-09-04
Advisory published
2025-09-04
Advisory updated
2025-09-04

Who should care

Sitecore administrators, application owners, security operations teams, and cloud/platform teams responsible for any Sitecore products covered by vendor guidance.

Technical summary

The published record identifies CVE-2025-53690 as a deserialization of untrusted data issue in Sitecore Multiple Products. The supplied source corpus does not include affected versions, a CVSS score, or impact specifics, so defenders should rely on Sitecore's official guidance and the CISA KEV entry for remediation context.

Defensive priority

Urgent (CISA KEV-listed)

Recommended defensive actions

  • Review Sitecore's official mitigation guidance referenced by CISA KEV.
  • Identify any deployed Sitecore products and confirm whether they are in scope for this CVE.
  • Prioritize remediation before the CISA due date of 2025-09-25.
  • If mitigations are unavailable for a deployment, consider service isolation or discontinuation consistent with vendor and CISA guidance.
  • Track the CVE in NVD and the CVE record for any updated technical details or affected-version information.

Evidence notes

The supplied corpus shows CVE-2025-53690 published and modified on 2025-09-04, the same date it was added to CISA's KEV catalog. CISA's KEV metadata names Sitecore as the vendor project, Multiple Products as the product, and records a due date of 2025-09-25. The KEV notes reference Sitecore KB1003865 for vendor instructions. No CVSS score or affected-version list was provided in the supplied data.

Sources and references

Verified primary and authoritative sources

  • CVE-2025-53690 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2025-53690

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2025-53690 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2025-53690

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.