{"answers":{"affected":"1 open source package ship an affected version, including canvaslms. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-36539 in the wild and no public exploit code.","fix":"Upgrade canvaslms to 2022-10-15.0.0 or later.","what":"CVE-2021-36539 is a medium-severity missing authorization vulnerability in n/a, published on 26 Jan 2023. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-36539 and fix it if it is affected.\n\nWhat it is: CVE-2021-36539 is a medium-severity missing authorization vulnerability in n/a, published on 26 Jan 2023. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-36539 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- canvaslms (Bitnami): affected all versions; fixed in 2022-10-15.0.0\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-2021-36539/ (Markdown: https://insights.sbomify.com/CVE-2021-36539/index.md)","id":"CVE-2021-36539","markdown":"https://insights.sbomify.com/CVE-2021-36539/index.md","name":"CVE-2021-36539","record":{"aliases":["BIT-canvaslms-2021-36539","GHSA-pw89-gxgv-mjvm"],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Canvas LMS","requires_auth":"low_privilege","summary":"Unprivileged users can access locked or unpublished files via DocViewer preview URLs, exposing sensitive content.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"canvas_learning_management_service","vendor":"instructure"}],"cvss":{"score":6.5,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-639","name":"Authorization Bypass Through User-Controlled Key"}],"description":"Instructure Canvas LMS didn't properly deny access to locked/unpublished files when the unprivileged user access the DocViewer based file preview URL (canvadoc_session_url).","ecosystems":["Bitnami"],"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":"Missing authorization in n/a","id":"CVE-2021-36539","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":null,"products":[],"type":"missing_authorization","year":"2021"},"n_packages":1,"n_references":2,"next":{"headline":"Cross-site request forgery in n/a","id":"CVE-2021-36542"},"packages":[{"ecosystem":"Bitnami","fixed":["2022-10-15.0.0"],"introduced":["0"],"last_affected":[],"package":"canvaslms","purl":"pkg:bitnami/canvaslms","source":"BIT-canvaslms-2021-36539"}],"prev":{"headline":"Cross-site scripting in n/a","id":"CVE-2021-36538"},"products":["n/a"],"published":"2023-01-26","related":[{"cvss_score":5.8,"headline":"Server-side request forgery in Instructure Canvas Learning Management System (LMS)","id":"CVE-2020-5775","kev_date_added":null,"published":"2020-08-21"}],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"Bitnami","prefix":"BIT"},{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-04","vendors":["n/a"]},"summary":"Unprivileged users can access locked or unpublished files via DocViewer preview URLs, exposing sensitive content.","url":"https://insights.sbomify.com/CVE-2021-36539/"}