{"answers":{"affected":"2 open source packages ship an affected version, including ssddanbrown/bookstack. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-4194 in the wild and no public exploit code.","fix":"Upgrade ssddanbrown/bookstack to 21.12.1 or later.","what":"CVE-2021-4194 is a medium-severity missing authorization vulnerability in bookstackapp/bookstack, published on 6 Jan 2022. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-4194 and fix it if it is affected.\n\nWhat it is: CVE-2021-4194 is a medium-severity missing authorization vulnerability in bookstackapp/bookstack, published on 6 Jan 2022. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-4194 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- ssddanbrown/bookstack (Packagist): affected all versions; fixed in 21.12.1\n- ssddanbrown/bookstack (Packagist): affected all versions; fixed in 21.12.1\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-2021-4194/ (Markdown: https://insights.sbomify.com/CVE-2021-4194/index.md)","id":"CVE-2021-4194","markdown":"https://insights.sbomify.com/CVE-2021-4194/index.md","name":"CVE-2021-4194","record":{"aliases":["GHSA-ghhm-xrwp-75m9"],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["data_read","data_modify"],"network_reachable":"yes","non_default_config":false,"product_category":"BookStack documentation","requires_auth":"low_privilege","summary":"Attackers can bypass access controls to read or modify unauthorized data in BookStack documentation software.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"@huntrdev","cpe":[{"product":"bookstack","vendor":"bookstackapp"}],"cvss":{"score":4.3,"severity":"medium","source":"cna","vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","version":"3.0"},"cwes":[{"id":"CWE-863","name":"Incorrect Authorization"},{"id":"CWE-284","name":"Improper Access Control"}],"description":"bookstack is vulnerable to Improper Access Control","ecosystems":["Packagist"],"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":"Improper Access Control in bookstackapp/bookstack","id":"CVE-2021-4194","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Packagist","product":null,"products":[],"type":"missing_authorization","year":"2021"},"n_packages":2,"n_references":2,"next":{"headline":"XSS in Firmanet Software and Technology Customer Relation Manager","id":"CVE-2021-4195"},"packages":[{"ecosystem":"Packagist","fixed":["21.12.1"],"introduced":["0"],"last_affected":[],"package":"ssddanbrown/bookstack","purl":null,"source":"GHSA-ghhm-xrwp-75m9"},{"ecosystem":"Packagist","fixed":["21.12.1"],"introduced":["0"],"last_affected":[],"package":"ssddanbrown/bookstack","purl":"pkg:composer/ssddanbrown/bookstack","source":"GHSA-ghhm-xrwp-75m9"}],"prev":{"headline":"Out-of-bounds Read in vim/vim","id":"CVE-2021-4193"},"products":["bookstackapp/bookstack"],"published":"2022-01-06","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":"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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-03","vendors":["bookstackapp"]},"summary":"Attackers can bypass access controls to read or modify unauthorized data in BookStack documentation software.","url":"https://insights.sbomify.com/CVE-2021-4194/"}