{"id":"CVE-2025-53690","url":"https://www.cyber-defence.io/tools/cve/CVE-2025-53690","generatedAt":"2026-10-28T08:10:41.254Z","title":"Sitecore Multiple Products Deserialization of Untrusted Data Vulnerability","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.","published":"2025-09-03T20:15:33.000Z","lastModified":"2026-10-18T21:10:00.000Z","status":"Analyzed","sourceIdentifier":"9947ef80-c5d5-474a-bbab-97341a59000e","cvss":{"version":"3.1","score":9,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H"},"cwe":["CWE-502"],"affected":["sitecore/experience commerce","sitecore/experience manager","sitecore/experience platform","sitecore/managed cloud"],"epss":{"score":0.60601,"percentile":0.9914,"date":"2026-10-27","history":[{"date":"2026-10-10","score":0.52508,"percentile":0.98942},{"date":"2026-10-12","score":0.60601,"percentile":0.99129}]},"kev":{"listed":true,"dateAdded":"2025-09-04","dueDate":"2025-09-25","knownRansomwareCampaignUse":"Unknown","notes":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.\nhttps://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1003865 ; https://nvd.nist.gov/vuln/detail/CVE-2025-53690"},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"Known to be exploited in the wild (CISA KEV, CISA remediation deadline 25 September 2025). Treat as an emergency change: patch or isolate now, then hunt for prior compromise."},"changes":[{"kind":"epss","label":"EPSS jump","at":"2026-10-12T00:00:00.000Z","detail":{"to":0.60601,"from":0.52508,"percentile":0.99129},"summary":"EPSS moved from 52.5% to 60.6% probability of exploitation in the next thirty days."}],"references":[{"url":"https://cloud.google.com/blog/topics/threat-intelligence/viewstate-deserialization-zero-day-vulnerability","tags":["Exploit","Third Party Advisory"],"source":"9947ef80-c5d5-474a-bbab-97341a59000e"},{"url":"https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1003865","tags":["Vendor Advisory"],"source":"9947ef80-c5d5-474a-bbab-97341a59000e"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-53690","tags":["US Government Resource"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-53690","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}