{"answers":{"affected":"2 open source packages ship an affected version, including UmbracoCms. It affects 1 product.","exploited":"There is no known exploitation of CVE-2020-5811 in the wild and no public exploit code.","fix":"Upgrade UmbracoCms to 8.9.2 or later.","what":"CVE-2020-5811 is a medium-severity path traversal vulnerability in Umbraco Umbraco Cms, published on 30 Dec 2020. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2020-5811 and fix it if it is affected.\n\nWhat it is: CVE-2020-5811 is a medium-severity path traversal vulnerability in Umbraco Umbraco Cms, published on 30 Dec 2020. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2020-5811 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- UmbracoCms (NuGet): affected all versions; fixed in 8.9.2\n- UmbracoCms (NuGet): affected all versions; fixed in 8.9.2\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-2020-5811/ (Markdown: https://insights.sbomify.com/CVE-2020-5811/index.md)","id":"CVE-2020-5811","markdown":"https://insights.sbomify.com/CVE-2020-5811/index.md","name":"CVE-2020-5811","record":{"aliases":["GHSA-936x-wgqv-hhgq"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution","data_modify"],"network_reachable":"yes","non_default_config":false,"product_category":"Umbraco CMS","requires_auth":"low_privilege","summary":"Authenticated attackers can write arbitrary files outside expected directories during package installation in Umbraco CMS, potentially leading to code execution.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"tenable","cpe":[{"product":"umbraco_cms","vendor":"umbraco"}],"cvss":{"score":6.5,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory"}],"description":"An authenticated path traversal vulnerability exists during package installation in Umbraco CMS \u003c= 8.9.1 or current, which could result in arbitrary files being written outside of the site home and expected paths when installing an Umbraco package.","ecosystems":["NuGet"],"exploits":{"exploitdb":1,"first_seen":"2021-08-31","github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[{"date":"2021-08-31","kind":"exploitdb","ref":"50241","stars":null,"title":"Umbraco CMS 8.9.1 - Directory Traversal"}],"tier":"poc_unverified"},"has_fix":true,"headline":"Authenticated path traversal in Umbraco CMS","id":"CVE-2020-5811","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"NuGet","product":"umbraco:umbraco_cms","products":["umbraco:umbraco_cms"],"type":"path_traversal","year":"2020"},"n_packages":2,"n_references":2,"next":{"headline":"Security feature bypass in Tenable Nessus AMI","id":"CVE-2020-5812"},"packages":[{"ecosystem":"NuGet","fixed":["8.9.2"],"introduced":["0"],"last_affected":[],"package":"UmbracoCms","purl":null,"source":"GHSA-936x-wgqv-hhgq"},{"ecosystem":"NuGet","fixed":["8.9.2"],"introduced":["0"],"last_affected":[],"package":"UmbracoCms","purl":"pkg:nuget/UmbracoCms","source":"GHSA-936x-wgqv-hhgq"}],"prev":{"headline":"Cross-site scripting in Umbraco CMS","id":"CVE-2020-5810"},"products":["Umbraco CMS"],"published":"2020-12-30","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)"},{"class":"attribution","licence":"GPL-2.0-or-later","name":"Exploit-DB"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-04","vendors":["n/a"]},"summary":"Authenticated attackers can write arbitrary files outside expected directories during package installation in Umbraco CMS, potentially leading to code execution.","url":"https://insights.sbomify.com/CVE-2020-5811/"}