{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-3916 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-3916 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-3916 is a medium-severity path traversal vulnerability in bookstackapp/bookstack, published on 5 Nov 2021. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-3916 and fix it if it is affected.\n\nWhat it is: CVE-2021-3916 is a medium-severity path traversal vulnerability in bookstackapp/bookstack, published on 5 Nov 2021. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-3916 in the wild and no public exploit code.\n\nAffected product: bookstackapp/bookstack. No package-level version data is available, so check the vendor advisory linked from the reference page.\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-2021-3916/ (Markdown: https://insights.sbomify.com/CVE-2021-3916/index.md)","id":"CVE-2021-3916","markdown":"https://insights.sbomify.com/CVE-2021-3916/index.md","name":"CVE-2021-3916","record":{"aliases":["GHSA-g66g-3vwf-hfgf"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"BookStack documentation","requires_auth":"low_privilege","summary":"An attacker can exploit a path traversal vulnerability in BookStack to read arbitrary files from the server.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"@huntrdev","cpe":[{"product":"bookstack","vendor":"bookstackapp"}],"cvss":{"score":6.5,"severity":"medium","source":"cna","vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","version":"3.0"},"cwes":[{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory"}],"description":"bookstack is vulnerable to Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"Path Traversal in bookstackapp/bookstack","id":"CVE-2021-3916","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"path_traversal","year":"2021"},"n_packages":0,"n_references":2,"next":{"headline":"coreos-installer \u003c 0.10.0 writes world-readable Ignition config to installed system","id":"CVE-2021-3917"},"packages":[],"prev":{"headline":"Unrestricted Upload of File with Dangerous Type in bookstackapp/bookstack","id":"CVE-2021-3915"},"products":["bookstackapp/bookstack"],"published":"2021-11-05","related":[{"cvss_score":7.9,"headline":"Remote Code Execution Through Image Uploads in BookStack","id":"CVE-2020-5256","kev_date_added":null,"published":"2020-03-09"},{"cvss_score":7.7,"headline":"Cross-Site Scripting in BookStack","id":"CVE-2020-26210","kev_date_added":null,"published":"2020-11-03"},{"cvss_score":7.7,"headline":"Cross-Site Scripting in BookStack","id":"CVE-2020-26211","kev_date_added":null,"published":"2020-11-03"},{"cvss_score":7.6,"headline":"Cross-site Scripting (XSS) - Stored in bookstackapp/bookstack","id":"CVE-2022-0877","kev_date_added":null,"published":"2022-03-08"},{"cvss_score":7.6,"headline":"Unrestricted Upload of File with Dangerous Type in bookstackapp/bookstack","id":"CVE-2021-3915","kev_date_added":null,"published":"2021-11-13"},{"cvss_score":6.5,"headline":"Book Stack v23.10.2 - LFR via Blind SSRF","id":"CVE-2023-6199","kev_date_added":null,"published":"2023-11-20"},{"cvss_score":6.5,"headline":"Improper Access Control in bookstackapp/bookstack","id":"CVE-2021-4026","kev_date_added":null,"published":"2021-11-30"}],"sources":[{"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":"2024-08-03","vendors":["bookstackapp"]},"summary":"An attacker can exploit a path traversal vulnerability in BookStack to read arbitrary files from the server.","url":"https://insights.sbomify.com/CVE-2021-3916/"}