{"answers":{"affected":"10 open source packages ship an affected version, including Umbraco.CMS. It affects 1 product.","exploited":"There is no known exploitation of CVE-2023-49279 in the wild and no public exploit code.","fix":"Upgrade Umbraco.CMS to a fixed version for your release line: 11.5.0, 12.2.0, 7.15.11 or 8.18.9.","what":"CVE-2023-49279 is a low-severity cross-site scripting vulnerability in Umbraco Umbraco Cms, published on 12 Dec 2023. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2023-49279 and fix it if it is affected.\n\nWhat it is: CVE-2023-49279 is a low-severity cross-site scripting vulnerability in Umbraco Umbraco Cms, published on 12 Dec 2023. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2023-49279 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 11.5.0\n- Umbraco.CMS (NuGet): affected from 11.0.0; fixed in 11.5.0\n- Umbraco.CMS (NuGet): affected from 12.0.0; fixed in 12.2.0\n- Umbraco.CMS (NuGet): affected from 12.0.0; fixed in 12.2.0\n- Umbraco.CMS (NuGet): affected from 7.0.0; fixed in 7.15.11\n- Umbraco.CMS (NuGet): affected from 7.0.0; fixed in 7.15.11\n- Umbraco.CMS (NuGet): affected from 8.0.0; fixed in 8.18.9\n- Umbraco.CMS (NuGet): affected from 8.0.0; fixed in 8.18.9\n- Umbraco.CMS (NuGet): affected from 9.0.0; fixed in 10.7.0\n- Umbraco.CMS (NuGet): affected from 9.0.0; fixed in 10.7.0\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-2023-49279/ (Markdown: https://insights.sbomify.com/CVE-2023-49279/index.md)","id":"CVE-2023-49279","markdown":"https://insights.sbomify.com/CVE-2023-49279/index.md","name":"CVE-2023-49279","record":{"aliases":["GHSA-6xmx-85x3-4cv2"],"analysis":{"component_type":"cms_plugin","fix_type":"patch","impacts":["code_execution","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"Umbraco CMS","requires_auth":"low_privilege","summary":"An attacker with backoffice access can upload malicious SVG files to execute scripts in other users' browsers, potentially leading to account takeover.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"umbraco_cms","vendor":"umbraco"}],"cvss":{"score":3.7,"severity":"low","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"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 files that include scripts. If the user can trick another user to load the media directly in a browser, the scripts can be executed. Versions 7.15.11, 8.18.9, 10.7.0, 11.5.0, and 12.2.0 contain a patch for this issue. Some workarounds are available. Implement the server side file validation or serve all media from an different host (e.g cdn) than where Umbraco is hosted.","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 vulnerable to stored XSS via SVG File Upload","id":"CVE-2023-49279","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"NuGet","product":"umbraco:umbraco_cms","products":["umbraco:umbraco_cms"],"type":"xss","year":"2023"},"n_packages":10,"n_references":2,"next":{"headline":"Data leak of password hash through xwiki change request","id":"CVE-2023-49280"},"packages":[{"ecosystem":"NuGet","fixed":["11.5.0"],"introduced":["11.0.0"],"last_affected":[],"package":"Umbraco.CMS","purl":null,"source":"GHSA-6xmx-85x3-4cv2"},{"ecosystem":"NuGet","fixed":["11.5.0"],"introduced":["11.0.0"],"last_affected":[],"package":"Umbraco.CMS","purl":"pkg:nuget/Umbraco.CMS","source":"GHSA-6xmx-85x3-4cv2"},{"ecosystem":"NuGet","fixed":["12.2.0"],"introduced":["12.0.0"],"last_affected":[],"package":"Umbraco.CMS","purl":null,"source":"GHSA-6xmx-85x3-4cv2"},{"ecosystem":"NuGet","fixed":["12.2.0"],"introduced":["12.0.0"],"last_affected":[],"package":"Umbraco.CMS","purl":"pkg:nuget/Umbraco.CMS","source":"GHSA-6xmx-85x3-4cv2"},{"ecosystem":"NuGet","fixed":["7.15.11"],"introduced":["7.0.0"],"last_affected":[],"package":"Umbraco.CMS","purl":null,"source":"GHSA-6xmx-85x3-4cv2"},{"ecosystem":"NuGet","fixed":["7.15.11"],"introduced":["7.0.0"],"last_affected":[],"package":"Umbraco.CMS","purl":"pkg:nuget/Umbraco.CMS","source":"GHSA-6xmx-85x3-4cv2"},{"ecosystem":"NuGet","fixed":["8.18.9"],"introduced":["8.0.0"],"last_affected":[],"package":"Umbraco.CMS","purl":null,"source":"GHSA-6xmx-85x3-4cv2"},{"ecosystem":"NuGet","fixed":["8.18.9"],"introduced":["8.0.0"],"last_affected":[],"package":"Umbraco.CMS","purl":"pkg:nuget/Umbraco.CMS","source":"GHSA-6xmx-85x3-4cv2"},{"ecosystem":"NuGet","fixed":["10.7.0"],"introduced":["9.0.0"],"last_affected":[],"package":"Umbraco.CMS","purl":null,"source":"GHSA-6xmx-85x3-4cv2"},{"ecosystem":"NuGet","fixed":["10.7.0"],"introduced":["9.0.0"],"last_affected":[],"package":"Umbraco.CMS","purl":"pkg:nuget/Umbraco.CMS","source":"GHSA-6xmx-85x3-4cv2"}],"prev":{"headline":"Umbraco CMS brute force exploit can be used to collect valid usernames","id":"CVE-2023-49278"},"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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2024-08-28","vendors":["umbraco"]},"summary":"An attacker with backoffice access can upload malicious SVG files to execute scripts in other users' browsers, potentially leading to account takeover.","url":"https://insights.sbomify.com/CVE-2023-49279/"}