{"schema_version":1,"title":"Umbraco CMS vulnerabilities","summary":"Junglewise Threat Intelligence has tracked 3 vulnerabilities in Umbraco CMS: 0 in the last 7 days and 1 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-117553, was published on 27 October 2026. 1 vulnerability in the last four weeks, up from none in the four before.","url":"https://junglewise.ai/threats/technologies/umbraco-cms-1","json_url":"https://junglewise.ai/threats/technologies/umbraco-cms-1.json","publisher":"Junglewise Threat Intelligence","license":"CC-BY-4.0","license_url":"https://creativecommons.org/licenses/by/4.0/","attribution":"Junglewise Threat Intelligence, https://junglewise.ai/threats/technologies/umbraco-cms-1","sources":"NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories","kind":"technology","thin":true,"counts":{"high":1,"all_time":3,"critical":0,"exploited":0,"last_7_days":0,"last_30_days":1,"last_90_days":1,"last_365_days":3},"latest":[{"cve":"CVE-2026-117553","cvss":7.5,"slug":"cve-2026-117553-umbraco-cms-before-17-7-2-and-18-2-2-contains-an-authentication","title":"Umbraco CMS authentication bypass via Host header poisoning","severity":"high","exploited":false,"published_at":"2026-10-27T14:16:35.84+00:00","url":"https://junglewise.ai/threats/cve-2026-117553-umbraco-cms-before-17-7-2-and-18-2-2-contains-an-authentication"},{"cve":"CVE-2021-47776","cvss":5.3,"epss":0.0039,"slug":"cve-2021-47776-umbraco-cms-contains-a-server-side-request-forgery-vulnerability","title":"Umbraco CMS contains a server-side request forgery vulnerability","severity":"medium","exploited":false,"published_at":"2026-01-15T16:16:09.51+00:00","url":"https://junglewise.ai/threats/cve-2021-47776-umbraco-cms-contains-a-server-side-request-forgery-vulnerability"},{"cve":"CVE-2025-66625","cvss":4.9,"epss":0.0036,"slug":"cve-2025-66625-umbraco-vulnerable-to-improper-file-access-and-credential","title":"Umbraco Vulnerable to Improper File Access and Credential Exposure in Dictionary Import Functionality","severity":"medium","exploited":false,"published_at":"2025-12-09T20:15:55.32+00:00","url":"https://junglewise.ai/threats/cve-2025-66625-umbraco-vulnerable-to-improper-file-access-and-credential"}],"weekly":[{"week":"2026-08-17","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-24","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-31","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-07","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-14","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-21","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-28","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-10-05","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-10-12","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-10-19","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-10-26","critical":0,"exploited":0,"vulnerabilities":1},{"week":"2026-11-02","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-11-09","critical":0,"exploited":0,"vulnerabilities":0}],"related":[],"technology":{"hub":true,"name":"Umbraco CMS","slug":"umbraco-cms-1","vendor":{"hub":true,"name":"Umbraco","slug":"umbraco","url":"https://junglewise.ai/threats/vendors/umbraco"},"aliases":["umbraco-umbraco-cms"],"category":"cms","url":"https://junglewise.ai/threats/technologies/umbraco-cms-1"},"most_severe":[{"cve":"CVE-2026-117553","cvss":7.5,"slug":"cve-2026-117553-umbraco-cms-before-17-7-2-and-18-2-2-contains-an-authentication","title":"Umbraco CMS authentication bypass via Host header poisoning","severity":"high","exploited":false,"published_at":"2026-10-27T14:16:35.84+00:00","url":"https://junglewise.ai/threats/cve-2026-117553-umbraco-cms-before-17-7-2-and-18-2-2-contains-an-authentication"},{"cve":"CVE-2021-47776","cvss":5.3,"epss":0.0039,"slug":"cve-2021-47776-umbraco-cms-contains-a-server-side-request-forgery-vulnerability","title":"Umbraco CMS contains a server-side request forgery vulnerability","severity":"medium","exploited":false,"published_at":"2026-01-15T16:16:09.51+00:00","url":"https://junglewise.ai/threats/cve-2021-47776-umbraco-cms-contains-a-server-side-request-forgery-vulnerability"},{"cve":"CVE-2025-66625","cvss":4.9,"epss":0.0036,"slug":"cve-2025-66625-umbraco-vulnerable-to-improper-file-access-and-credential","title":"Umbraco Vulnerable to Improper File Access and Credential Exposure in Dictionary Import Functionality","severity":"medium","exploited":false,"published_at":"2025-12-09T20:15:55.32+00:00","url":"https://junglewise.ai/threats/cve-2025-66625-umbraco-vulnerable-to-improper-file-access-and-credential"}],"generated_at":"2026-11-09T03:07:00.176479+00:00"}