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
- Unknown
- 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.
Official resources
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CVE-2025-53690 CVE record
CVE.org
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CVE-2025-53690 NVD detail
NVD
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CISA Known Exploited Vulnerabilities catalog
CISA - Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
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Source item URL
cisa_kev
Published and last modified on 2025-09-04; CISA KEV listing date is also 2025-09-04.