About “Umbraco CMS”

A curated feed of “Umbraco CMS”-related CVEs appears below. We currently track 71 CVEs for this tag (all time). In the last 365 days, 12 were published. Average CVSS is 5.9 (all time; 6.8 over 365d), and 27% are rated High/Critical (all time). Top CWEs (last 365 days): CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor, CWE-269 - Improper Privilege Management.

In our taxonomy this topic maps to a MODERATE impact class. CMS and plugins expand attack surface. Patch core, themes, and plugins, remove abandoned extensions, restrict admin access, enable WAF, and keep backups. Use the filters below to sort by CVSS, risk and CWE. Each detail page highlights vendor advisories and mitigation tips.

Support & lifecycle: umbraco

This table shows recent release cycles and their projected end-of-life. Data source: endoflife.date.

CycleReleaseLatestPremier SupportEOLLTS
1717.4.2LTS
1616.5.1 Soon
1515.4.4 Expired
1414.3.4 Expired
1313.14.0LTS
1212.3.10 Expired
1111.5.0 Expired
1010.8.11 ExpiredLTS
99.5.4 Expired
88.18.15 ExpiredLTS
77.15.11 ExpiredLTS
66.2.6 Expired

Maintained Soon (≤ 180 days) Expired

Subscribe lifecycle: RSS  ·  RSS (expired)  ·  ICS

Subscribe CVEs: RSS for “Umbraco CMS”  ·  RSS (High+Critical only)

CVEs tagged with this topic. Filters apply to the whole list (loaded from JSON).

CVSS ≥ 0.0
2026-03-10
High

CVE-2026-31834

Umbraco is an ASP.NET CMS. From 15.3.1 to before 16.5.1 and 17.2.2, A privilege escalation vulnerability has been identified in Umbraco CMS. Under certain conditions, authenticated backoffice users w…

Medium

CVE-2026-31833

Umbraco is an ASP.NET CMS. From 16.2.0 to before 16.5.1 and 17.2.2, An authenticated backoffice user with access to Settings can inject malicious HTML into property type descriptions. Due to an overl…

Medium

CVE-2026-31832

Umbraco is an ASP.NET CMS. From 14.0.0 to before 16.5.1 and 17.2.2, A broken object-level authorization vulnerability exists in a backoffice API endpoint that allows authenticated users to assign dom…

2026-02-26
High

CVE-2026-27449

Umbraco Engage is a business intelligence platform. A vulnerability has been identified in Umbraco Engage prior to versions 16.2.1 and 17.1.1 where certain API endpoints are exposed without enforcing…

2026-01-29
Medium

CVE-2026-24687

Umbraco Forms is a form builder that integrates with the Umbraco content management system. It's possible for an authenticated backoffice-user to enumerate and traverse paths/files on the systems fil…

2026-01-16
High

CVE-2025-68924

In Umbraco UmbracoForms through 8.13.16, an authenticated attacker can supply a malicious WSDL (aka Webservice) URL as a data source for remote code execution.

2026-01-15
Medium

CVE-2021-47776

Umbraco CMS v8.14.1 contains a server-side request forgery vulnerability that allows attackers to manipulate baseUrl parameters in multiple dashboard and help controller endpoints. Attackers can craf…

2025-12-22
Critical

CVE-2025-67288

An arbitrary file upload vulnerability in Umbraco CMS v16.3.3 allows attackers to execute arbitrary code by uploading a crafted PDF file. NOTE: this is disputed by the Supplier because the responsibi…

2025-12-09
Medium

CVE-2025-66625

Umbraco is an ASP.NET CMS. Due to unsafe handling and deletion of temporary files in versions 10.0.0 through 13.12.0, during the dictionary upload process an attacker with access to the backoffice ca…

2025-08-13
Critical

CVE-2012-10054

Umbraco CMS versions prior to 4.7.1 are vulnerable to unauthenticated remote code execution via the codeEditorSave.asmx SOAP endpoint, which exposes a SaveDLRScript operation that permits arbitrary f…

2025-07-30
Medium

CVE-2025-54425

Umbraco is an ASP.NET CMS. In versions 13.0.0 through 13.9.2, 15.0.0 through 15.4.1 and 16.0.0 through 16.1.0, the content delivery API can be restricted from public access where an API key must be p…

2025-06-24
Medium

CVE-2025-49147

Umbraco, a free and open source .NET content management system, has a vulnerability in versions 10.0.0 through 10.8.10 and 13.0.0 through 13.9.1. Via a request to an anonymously authenticated endpoin…

2025-06-03
Medium

CVE-2025-48953

Umbraco is an ASP.NET content management system (CMS). Starting in version 14.0.0 and prior to versions 15.4.2 and 16.0.0, it's possible to upload a file that doesn't adhere with the configured allow…

2025-05-13
Medium

CVE-2025-47280

Umbraco Forms is a form builder that integrates with the Umbraco content management system. Starting in the 7.x branch and prior to versions 13.4.2 and 15.1.2, the 'Send email' workflow does not HTML…

2025-05-06
Medium

CVE-2025-46736

Umbraco is a free and open source .NET content management system. Prior to versions 10.8.10 and 13.8.1, based on an analysis of the timing of post login API responses, it's possible to determine whet…

2025-04-08
High

CVE-2025-32017

Umbraco is a free and open source .NET content management system. Authenticated users to the Umbraco backoffice are able to craft management API request that exploit a path traversal vulnerability to…

2025-03-11
Medium

CVE-2025-27602

Umbraco is a free and open source .NET content management system. In versions of Umbraco's web backoffice program prior to versions 10.8.9 and 13.7.1, via manipulation of backoffice API URLs, it's po…

Medium

CVE-2025-27601

Umbraco is a free and open source .NET content management system. An improper API access control issue has been identified Umbraco's API management package prior to versions 15.2.3 and 14.3.3, allowi…

2025-01-22
Medium

CVE-2024-55488

A stored cross-site scripting (XSS) vulnerability in Umbraco CMS v14.3.1 allows attackers to execute arbitrary web scripts or HTML via a crafted payload. NOTE: This has been disputed by the vendor si…

2025-01-21
Medium

CVE-2025-24012

Umbraco is a free and open source .NET content management system. Starting in version 14.0.0 and prior to versions 14.3.2 and 15.1.2, authenticated users are able to exploit a cross-site scripting vu…

Medium

CVE-2025-24011

Umbraco is a free and open source .NET content management system. Starting in version 14.0.0 and prior to versions 14.3.2 and 15.1.2, it's possible to determine whether an account exists based on an…

2025-01-14
Medium

CVE-2025-23041

Umbraco.Forms is a web form framework written for the nuget ecosystem. Character limits configured by editors for short and long answer fields are validated only client-side, not server-side. This is…

2024-11-04
Medium

CVE-2024-10761

A vulnerability was found in Umbraco CMS up to 10.7.7/12.3.6/13.5.2/14.3.1/15.1.1. It has been classified as problematic. Affected is an unknown function of the file /Umbraco/preview/frame?id{} of th…

2024-10-22
Medium

CVE-2024-48929

Umbraco is a free and open source .NET content management system. In versions on the 13.x branch prior to 13.5.2 and versions on the 10.x branch prior to 10.8.7, during an explicit sign-out, the serv…

Medium

CVE-2024-48927

Umbraco, a free and open source .NET content management system, has a remote code execution issue in versions on the 13.x branch prior to 13.5.2, 10.x prior to 10.8.7, and 8.x prior to 8.18.15. There…

Medium

CVE-2024-48926

Umbraco, a free and open source .NET content management system, has an insufficient session expiration issue in versions on the 13.x branch prior to 13.5.2, 10.x prior to 10.8.7, and 8.x prior to 8.1…

Low

CVE-2024-48925

Umbraco, a free and open source .NET content management system, has an improper access control issue starting in version 14.0.0 and prior to version 14.3.0. The issue allows low-privilege users to ac…

Medium

CVE-2024-47819

Umbraco, a free and open source .NET content management system, has a cross-site scripting vulnerability starting in version 14.0.0 and prior to versions 14.3.1 and 15.0.0. This can be leveraged to g…

2024-08-20
Medium

CVE-2024-43377

Umbraco CMS is an ASP.NET CMS. An authenticated user can access a few unintended endpoints. This issue is fixed in 14.1.2.

Medium

CVE-2024-43376

Umbraco is an ASP.NET CMS. Some endpoints in the Management API can return stack trace information, even when Umbraco is not in debug mode. This vulnerability is fixed in 14.1.2.

2024-05-28
Medium

CVE-2024-35240

Umbraco Commerce is an open source dotnet ecommerce solution. In affected versions there exists a stored Cross-site scripting (XSS) issue which would enable attackers to inject malicious code into Pr…

Low

CVE-2024-35239

Umbraco Commerce is an open source dotnet web forms solution. In affected versions an authenticated user that has access to edit Forms may inject unsafe code into Forms components. This issue can be…

2024-05-21
Medium

CVE-2024-35218

Umbraco CMS is an ASP.NET CMS used by more than 730.000 websites. Stored Cross-site scripting (XSS) enable attackers that have access to backoffice to bring malicious content into a website or applic…

Medium

CVE-2024-34071

Umbraco is an ASP.NET CMS used by more than 730.000 websites. Umbraco has an endpoint that is vulnerable to open redirects. The endpoint is protected so it requires the user to be signed into backoff…

2024-04-24
Medium

CVE-2024-32872

Umbraco workflow provides workflows for the Umbraco content management system. Prior to versions 10.3.9, 12.2.6, and 13.0.6, an Umbraco Backoffice user can modify requests to a particular API endpoin…

2024-04-17
Medium

CVE-2024-29035

Umbraco is an ASP.NET CMS. Failing webhooks logs are available when solution is not in debug mode. Those logs can contain information that is critical. This vulnerability is fixed in 13.1.1.

2024-03-20
Low

CVE-2024-28868

Umbraco is an ASP.NET content management system. Umbraco 10 prior to 10.8.4 with access to the native login screen is vulnerable to a possible user enumeration attack. This issue was fixed in version…

2023-12-12
Low

CVE-2023-49279

Umbraco is an ASP.NET content management system (CMS). Starting in version 7.0.0 and prior to versions 7.15.11, 8.18.9, 10.7.0, 11.5.0, and 12.2.0, a user with access to the backoffice can upload SVG…

Medium

CVE-2023-49278

Umbraco is an ASP.NET content management system (CMS). Starting in version 8.0.0 and prior to versions 8.18.10, 10.8.1, and 12.3.4, a brute force exploit can be used to collect valid usernames. Versi…

Low

CVE-2023-49274

Umbraco is an ASP.NET content management system (CMS). Starting in version 8.0.0 and prior to versions 8.18.10, 10.8.1, and 12.3.4, a user enumeration attack is possible when SMTP is not set up corre…

Medium

CVE-2023-49273

Umbraco is an ASP.NET content management system (CMS). Starting in version 8.0.0 and prior to versions 8.18.10, 10.8.1, and 12.3.4, users with low privileges (Editor, etc.) are able to access some un…

High

CVE-2023-49089

Umbraco is an ASP.NET content management system (CMS). Starting in version 8.0.0 and prior to versions 8.18.10, 10.8.1, and 12.3.0, Backoffice users with permissions to create packages can use path t…

Medium

CVE-2023-48313

Umbraco is an ASP.NET content management system (CMS). Starting in 10.0.0 and prior to versions 10.8.1 and 12.3.4, Umbraco contains a cross-site scripting (XSS) vulnerability enabling attackers to b…

Medium

CVE-2023-48227

Umbraco is an ASP.NET content management system (CMS). Starting in version 8.0.0 and prior to versions 8.18.10, 10.7.0, and 12.3.0, Backoffice users with send for approval permission but not publish…

Low

CVE-2023-38694

Umbraco is an ASP.NET content management system (CMS). Starting in version 8.0.0 and prior to versions 8.18.10, 10.7.0, and 12.1.0, a user with access to a specific part of the backoffice is able to…

2023-07-13
High

CVE-2023-37267

Umbraco is a ASP.NET CMS. Under rare conditions a restart of Umbraco can allow unauthorized users access to admin-level permissions. This vulnerability was patched in versions 10.6.1, 11.4.2 and 12.0…

2023-06-09
Low

CVE-2023-32312

UmbracoIdentityExtensions is an Umbraco add-on package that enables easy extensibility points for ASP.Net Identity integration. In affected versions client secrets are not required which may expose s…

2023-05-18
High

CVE-2019-25137

Umbraco CMS 4.11.8 through 7.15.10, and 7.12.4, allows Remote Code Execution by authenticated administrators via msxsl:script in an xsltSelection to developer/Xslt/xsltVisualize.aspx.

2023-02-24
Critical

CVE-2021-33224

File upload vulnerability in Umbraco Forms v.8.7.0 allows unauthenticated attackers to execute arbitrary code via a crafted web.config and asp file.

2022-01-18
Medium

CVE-2022-22691

The password reset component deployed within Umbraco uses the hostname supplied within the request host header when building a password reset URL. It may be possible to manipulate the URL sent to Umb…

High

CVE-2022-22690

Within the Umbraco CMS, a configuration element named "UmbracoApplicationUrl" (or just "ApplicationUrl") is used whenever application code needs to build a URL pointing back to the site. For example,…

2021-08-25
Critical

CVE-2021-37334

Umbraco Forms version 4.0.0 up to and including 8.7.5 and below are vulnerable to a security flaw that could lead to a remote code execution attack and/or arbitrary file deletion. A vulnerability occ…

2021-06-28
Medium

CVE-2021-34254

Umbraco CMS before 7.15.7 is vulnerable to Open Redirection due to insufficient url sanitization on booting.aspx.

2020-12-30
Medium

CVE-2020-5811

An authenticated path traversal vulnerability exists during package installation in Umbraco CMS <= 8.9.1 or current, which could result in arbitrary files being written outside of the site home and e…

Medium

CVE-2020-5810

A stored XSS vulnerability exists in Umbraco CMS <= 8.9.1 or current. An authenticated user authorized to upload media can upload a malicious .svg file which act as a stored XSS payload.

Medium

CVE-2020-5809

A stored XSS vulnerability exists in Umbraco CMS <= 8.9.1 or current. An authenticated user can inject arbitrary JavaScript code into iframes when editing content using the TinyMCE rich-text editor,…

2020-12-02
Medium

CVE-2020-29454

Editors/LogViewerController.cs in Umbraco through 8.9.1 allows a user to visit a logviewer endpoint even if they lack Applications.Settings access.

2020-03-16
Medium

CVE-2020-9472

Umbraco CMS 8.5.3 allows an authenticated file upload (and consequently Remote Code Execution) via the Install Package functionality.

High

CVE-2020-9471

Umbraco Cloud 8.5.3 allows an authenticated file upload (and consequently Remote Code Execution) via the Install Packages functionality.

2020-01-23
Medium

CVE-2020-7210

Umbraco CMS 8.2.2 allows CSRF to enable/disable or delete user accounts.

2019-10-02
Critical

CVE-2019-13957

In Umbraco 7.3.8, there is SQL Injection in the backoffice/PageWApprove/PageWApproveApi/GetInpectSearch method via the nodeName parameter.

2018-11-27
Medium

CVE-2018-17256

Persistent cross-site scripting (XSS) vulnerability in Umbraco CMS 7.12.3 allows authenticated users to inject arbitrary web script via the Header Name of a content (Blog, Content Page, etc.). The vu…

2018-08-27
Critical

CVE-2014-10074

Umbraco before 7.2.0 has a remote PHP code execution vulnerability because Umbraco.Web.UI/config/umbracoSettings.Release.config does not block the upload of .php files.

2017-10-12
Medium

CVE-2017-15280

XML external entity (XXE) vulnerability in Umbraco CMS before 7.7.3 allows attackers to obtain sensitive information by reading files on the server or sending TCP requests to intranet hosts (aka SSRF…

Medium

CVE-2017-15279

Cross-site scripting (XSS) vulnerability in Umbraco CMS before 7.7.3 allows remote attackers to inject arbitrary web script or HTML via the "page name" (aka nodename) parameter during the creation of…

2017-04-13
Critical

CVE-2012-1301

The FeedProxy.aspx script in Umbraco 4.7.0 allows remote attackers to proxy requests on their behalf via the "url" parameter.

2017-03-03
Medium

CVE-2015-8815

Multiple cross-site scripting (XSS) vulnerabilities in Umbraco before 7.4.0 allow remote attackers to inject arbitrary web script or HTML via the name parameter to (1) the media page, (2) the develop…

High

CVE-2015-8814

Umbraco before 7.4.0 allows remote attackers to bypass anti-forgery security measures and conduct cross-site request forgery (CSRF) attacks as demonstrated by editing user account information in the…

High

CVE-2015-8813

The Page_Load function in Umbraco.Web/umbraco.presentation/umbraco/dashboard/FeedProxy.aspx.cs in Umbraco before 7.4.0 allows remote attackers to conduct server-side request forgery (SSRF) attacks vi…

2014-12-27
High

CVE-2013-4793

The update function in umbraco.webservices/templates/templateService.cs in the TemplateService component in Umbraco CMS before 6.0.4 does not require authentication, which allows remote attackers to…

2013-11-19
Medium

CVE-2013-0741

Cross-site scripting (XSS) vulnerability in imagegen.ashx in Percipient Studios ImageGen before 2.9.0 for Umbraco CMS allows remote attackers to inject arbitrary web script or HTML via the font param…

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