Unauthorized content access and deletion via duplicate identifiers
Published Mar 11, 2025 · Updated Mar 11, 2025
Incorrect authorization in Umbraco CMS 10.8.8 and earlier and 11.0.0-rc1 through 13.7.0 allows remote authenticated users to access restricted items. The content and media permission query-string handlers stringify multiple id values for authorization, while the controller processes only the first value, allowing a permitted duplicate identifier to mask the restricted target. A backoffice account with editor access is required; successful exploitation reads content or media outside the assigned folders or deletes those items.
Summary
What happened
Incorrect authorization in Umbraco CMS 10.8.8 and earlier and 11.0.0-rc1 through 13.7.0 allows remote authenticated users to access restricted items. The content and media permission query-string handlers stringify multiple id values for authorization, while the controller processes only the first value, allowing a permitted duplicate identifier to mask the restricted target. A backoffice account with editor access is required; successful exploitation reads content or media outside the assigned folders or deletes those items.
The record
- CVE
- CVE-2025-27602
- Published
- Mar 11, 2025
- Updated
- Mar 11, 2025
- Vendor
- Umbraco
- Product
- Umbraco CMS
- Classifications
- CWE-285, CWE-863, T1485, T1213
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Mar 11, 2025CVE publishedPublication date reported by the CVE source.
- Mar 11, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 10.8.9
- Affected versionversion=>= 11.0.0-rc1, < 13.7.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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