CVE-2025-27602: Umbraco.Cms.Web.Backoffice Umbraco Allows A Restricted Editor Vulnerability

MODERATE
Advisory Identifier: GHSA-wx5h-wqfq-v698
Share
CVSS 4.9
CWE-285 CWE-863
Published
Advisory Summary

CVE-2025-27602 is a MODERATE (CVSS 4.9) umbraco allows a restricted editor vulnerability (CWE-285: Improper Authorization) affecting Umbraco.Cms.Web.Backoffice libraries in the NuGet ecosystem. The issue involves umbraco allows a restricted editor user to delete media item or access unauthorized content. Remediation is available by upgrading affected packages to version 10.8.9, 13.7.1.

CVE-2025-27602 at a Glance

CVE Identifier CVE-2025-27602
GHSA Identifier GHSA-wx5h-wqfq-v698
Severity MODERATE
CVSS v3.1 Base Score 4.9
CWE Classification CWE-285: Improper Authorization
Affected Product Umbraco.Cms.Web.Backoffice
Package Ecosystem NuGet
Published Date
Last Updated

Security Impact

CVSS: 4.9

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Changed (S:C)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2025-27602

To remediate this vulnerability, upgrade all affected Umbraco.Cms.Web.Backoffice dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Umbraco.Cms.Web.Backoffice fixed: 10.8.9 
Upgrade Umbraco.Cms.Web.Backoffice to 10.8.9
Umbraco.Cms.Web.Backoffice fixed: 13.7.1 
Upgrade Umbraco.Cms.Web.Backoffice to 13.7.1
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for Umbraco.Cms.Web.Backoffice

How to Check if You Are Affected

To determine whether your application is affected by CVE-2025-27602, inspect your project dependencies for Umbraco.Cms.Web.Backoffice:

inspect dependencies for Umbraco.Cms.Web.Backoffice

Analyze the terminal output to locate any version of Umbraco.Cms.Web.Backoffice in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 10.8.9), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-285: Improper Authorization, where the product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. In Umbraco.Cms.Web.Backoffice, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Impact Via manipulation of backoffice API URLs it's possible for authenticated backoffice users to retrieve or delete content or media held within folders the editor does not have access to. ### Patches Will be patched in 10.8.9 and 13.7.1 ### Workarounds None available.

CVE-2025-27602 Affected Umbraco.Cms.Web.Backoffice Versions

2 component(s)
Fixed Versions:
10.8.913.7.1
Product / Package Ecosystem Affected Versions Fixed Version
Umbraco.Cms.Web.Backoffice
nuget/Umbraco.Cms.Web.Backoffice
NuGet
< 10.8.9
10.8.9
Umbraco.Cms.Web.Backoffice
nuget/Umbraco.Cms.Web.Backoffice
NuGet
≥ 11.0.0-rc1
< 13.7.1
13.7.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-wx5h-wqfq-v698
NVD — CVE-2025-27602 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-27602
Security Fix Commit FIX COMMIT
https://github.com/umbraco/Umbraco-CMS/commit/5b54bed406682ceff57903bf7d3c57814eef31a7
Security Fix Commit FIX COMMIT
https://github.com/umbraco/Umbraco-CMS/commit/7888b9a4ce5ae7f9bda7ff3bb705b8fcd2f1675d
Umbraco.Cms.Web.Backoffice Source Repository REPOSITORY
https://github.com/umbraco/Umbraco-CMS

Frequently Asked Questions

What is CVE-2025-27602?
CVE-2025-27602 is a security vulnerability in Umbraco.Cms.Web.Backoffice involving Umbraco Allows a Restricted Editor User to Delete Media Item or Access Unauthorized Content under CWE-285: Improper Authorization.
Which Umbraco.Cms.Web.Backoffice versions are affected?
Affected versions include releases prior to 10.8.9, 13.7.1 across affected packages: Umbraco.Cms.Web.Backoffice.
What version fixes CVE-2025-27602?
Upgrading to 10.8.9, 13.7.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is Umbraco.Cms.Web.Backoffice affected?
Yes, Umbraco.Cms.Web.Backoffice is affected in releases prior to 10.8.9, 13.7.1. Upgrade your dependency to 10.8.9, 13.7.1 or later.
What is the CVSS score of CVE-2025-27602?
CVE-2025-27602 has a CVSS v3.1 base score of 4.9 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2025-27602?
CVE-2025-27602 is classified under CWE-285: Improper Authorization (The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.).
How can I check NuGet dependencies for CVE-2025-27602?
Run the dependency tree command: 'inspect dependencies for Umbraco.Cms.Web.Backoffice'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-wx5h-wqfq-v698",
  "modified" : "2025-03-12T14:40:32Z",
  "published" : "2025-03-11T15:27:34Z",
  "aliases" : [ "CVE-2025-27602" ],
  "summary" : "Umbraco Allows a Restricted Editor User to Delete Media Item or Access Unauthorized Content",
  "details" : "### Impact\nVia manipulation of backoffice API URLs it's possible for authenticated backoffice users to retrieve or delete content or media held within folders the editor does not have access to.\n\n### Patches\nWill be patched in 10.8.9 and 13.7.1\n\n### Workarounds\nNone available.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Umbraco.Cms.Web.Backoffice"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "10.8.9"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 10.8.8"
    }
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Umbraco.Cms.Web.Backoffice"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "11.0.0-rc1"
      }, {
        "fixed" : "13.7.1"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 13.7.0"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-wx5h-wqfq-v698"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-27602"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/umbraco/Umbraco-CMS/commit/5b54bed406682ceff57903bf7d3c57814eef31a7"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/umbraco/Umbraco-CMS/commit/7888b9a4ce5ae7f9bda7ff3bb705b8fcd2f1675d"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/umbraco/Umbraco-CMS"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-285", "CWE-863" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-03-11T15:27:34Z",
    "nvd_published_at" : "2025-03-11T16:15:18Z"
  }
}