{"answers":{"affected":"6 open source packages ship an affected version, including Umbraco.CMS. It affects 1 product.","exploited":"There is no known exploitation of CVE-2023-49278 in the wild and no public exploit code.","fix":"Upgrade Umbraco.CMS to a fixed version for your release line: 12.3.4, 8.18.10 or 10.8.1.","what":"CVE-2023-49278 is a medium-severity vulnerability in Umbraco Umbraco Cms, published on 12 Dec 2023. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2023-49278 and fix it if it is affected.\n\nWhat it is: CVE-2023-49278 is a medium-severity vulnerability in Umbraco Umbraco Cms, published on 12 Dec 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2023-49278 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- Umbraco.CMS (NuGet): affected from 11.0.0; fixed in 12.3.4\n- Umbraco.CMS (NuGet): affected from 11.0.0; fixed in 12.3.4\n- Umbraco.CMS (NuGet): affected from 8.0.0; fixed in 8.18.10\n- Umbraco.CMS (NuGet): affected from 8.0.0; fixed in 8.18.10\n- Umbraco.CMS (NuGet): affected from 9.0.0; fixed in 10.8.1\n- Umbraco.CMS (NuGet): affected from 9.0.0; fixed in 10.8.1\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2023-49278/ (Markdown: https://insights.sbomify.com/CVE-2023-49278/index.md)","id":"CVE-2023-49278","markdown":"https://insights.sbomify.com/CVE-2023-49278/index.md","name":"CVE-2023-49278","record":{"aliases":["GHSA-7x74-h8cw-qhxq"],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Umbraco CMS","requires_auth":"none","summary":"Attackers can brute force valid usernames in Umbraco CMS, exposing user account information.","user_interaction":"not_required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"umbraco_cms","vendor":"umbraco"}],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-307","name":"Improper Restriction of Excessive Authentication Attempts"},{"id":"CWE-200","name":"Exposure of Sensitive Information to an Unauthorized Actor"}],"description":"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. Versions 8.18.10, 10.8.1, and 12.3.4 contain a patch for this issue.","ecosystems":["NuGet"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Umbraco CMS brute force exploit can be used to collect valid usernames","id":"CVE-2023-49278","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"NuGet","product":"umbraco:umbraco_cms","products":["umbraco:umbraco_cms"],"type":"information_disclosure","year":"2023"},"n_packages":6,"n_references":1,"next":{"headline":"Umbraco CMS vulnerable to stored XSS via SVG File Upload","id":"CVE-2023-49279"},"packages":[{"ecosystem":"NuGet","fixed":["12.3.4"],"introduced":["11.0.0"],"last_affected":[],"package":"Umbraco.CMS","purl":null,"source":"GHSA-7x74-h8cw-qhxq"},{"ecosystem":"NuGet","fixed":["12.3.4"],"introduced":["11.0.0"],"last_affected":[],"package":"Umbraco.CMS","purl":"pkg:nuget/Umbraco.CMS","source":"GHSA-7x74-h8cw-qhxq"},{"ecosystem":"NuGet","fixed":["8.18.10"],"introduced":["8.0.0"],"last_affected":[],"package":"Umbraco.CMS","purl":null,"source":"GHSA-7x74-h8cw-qhxq"},{"ecosystem":"NuGet","fixed":["8.18.10"],"introduced":["8.0.0"],"last_affected":[],"package":"Umbraco.CMS","purl":"pkg:nuget/Umbraco.CMS","source":"GHSA-7x74-h8cw-qhxq"},{"ecosystem":"NuGet","fixed":["10.8.1"],"introduced":["9.0.0"],"last_affected":[],"package":"Umbraco.CMS","purl":null,"source":"GHSA-7x74-h8cw-qhxq"},{"ecosystem":"NuGet","fixed":["10.8.1"],"introduced":["9.0.0"],"last_affected":[],"package":"Umbraco.CMS","purl":"pkg:nuget/Umbraco.CMS","source":"GHSA-7x74-h8cw-qhxq"}],"prev":{"headline":"Reflected Cross-site Scripting Vulnerability in dpaste","id":"CVE-2023-49277"},"products":["Umbraco-CMS"],"published":"2023-12-12","related":[{"cvss_score":10,"headline":"Umbraco CMS has an arbitrary file upload vulnerability","id":"CVE-2025-67288","kev_date_added":null,"published":"2025-12-22"},{"cvss_score":9.8,"headline":"File upload in n/a","id":"CVE-2014-10074","kev_date_added":null,"published":"2018-08-27"},{"cvss_score":9.8,"headline":"Server-side request forgery in n/a","id":"CVE-2012-1301","kev_date_added":null,"published":"2017-04-13"},{"cvss_score":9.3,"headline":"Umbraco CMS \u003c 4.7.1 codeEditorSave.asmx RCE","id":"CVE-2012-10054","kev_date_added":null,"published":"2025-08-13"},{"cvss_score":8.8,"headline":"Umbraco has a Management API Vulnerability to Path Traversal With Authenticated Users","id":"CVE-2025-32017","kev_date_added":null,"published":"2025-04-08"},{"cvss_score":8.8,"headline":"Umbraco CMS Authenticated File Upload","id":"CVE-2020-9471","kev_date_added":null,"published":"2020-03-16"},{"cvss_score":8.6,"headline":"Umbraco Remote ApplicationURL Overwrite","id":"CVE-2022-22690","kev_date_added":null,"published":"2022-01-18"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2024-10-08","vendors":["umbraco"]},"summary":"Attackers can brute force valid usernames in Umbraco CMS, exposing user account information.","url":"https://insights.sbomify.com/CVE-2023-49278/"}