{"answers":{"affected":"2 open source packages ship an affected version, including org.keycloak:keycloak-core. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-3856 in the wild and no public exploit code.","fix":"Upgrade org.keycloak:keycloak-core to 15.1.0 or later.","what":"CVE-2021-3856 is a medium-severity path traversal vulnerability in Redhat Keycloak, published on 26 Aug 2022. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-3856 and fix it if it is affected.\n\nWhat it is: CVE-2021-3856 is a medium-severity path traversal vulnerability in Redhat Keycloak, published on 26 Aug 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-2021-3856 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- org.keycloak:keycloak-core (Maven): affected all versions; fixed in 15.1.0\n- org.keycloak:keycloak-core (Maven): affected all versions; fixed in 15.1.0\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-2021-3856/ (Markdown: https://insights.sbomify.com/CVE-2021-3856/index.md)","id":"CVE-2021-3856","markdown":"https://insights.sbomify.com/CVE-2021-3856/index.md","name":"CVE-2021-3856","record":{"aliases":["GHSA-3w4v-rvc4-2xpw"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Keycloak identity server","requires_auth":"low_privilege","summary":"Attackers can read arbitrary files accessible to the classloader by manipulating theme resource requests, exposing sensitive data.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"keycloak","vendor":"redhat"}],"cvss":{"score":4.3,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory"},{"id":"CWE-552","name":"Files or Directories Accessible to External Parties"}],"description":"ClassLoaderTheme and ClasspathThemeResourceProviderFactory allows reading any file available as a resource to the classloader. By sending requests for theme resources with a relative path from an external HTTP client, the client will receive the content of random files if available.","ecosystems":["Maven"],"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":"Keycloak has Files or Directories Accessible to External Parties","id":"CVE-2021-3856","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":"redhat:keycloak","products":["redhat:keycloak"],"type":"path_traversal","year":"2021"},"n_packages":2,"n_references":5,"next":{"headline":"Cross-site Scripting (XSS) - Stored in chaskiq/chaskiq","id":"CVE-2021-3857"},"packages":[{"ecosystem":"Maven","fixed":["15.1.0"],"introduced":["0"],"last_affected":[],"package":"org.keycloak:keycloak-core","purl":null,"source":"GHSA-3w4v-rvc4-2xpw"},{"ecosystem":"Maven","fixed":["15.1.0"],"introduced":["0"],"last_affected":[],"package":"org.keycloak:keycloak-core","purl":"pkg:maven/org.keycloak/keycloak-core","source":"GHSA-3w4v-rvc4-2xpw"}],"prev":{"headline":"Command Injection in Liman Central Management System","id":"CVE-2021-3855"},"products":["keycloak"],"published":"2022-08-26","related":[{"cvss_score":10,"headline":"Keycloak vulnerable to cross-site scripting when validating URI-schemes on SAML and OIDC","id":"CVE-2022-4361","kev_date_added":null,"published":"2023-07-07"},{"cvss_score":9.8,"headline":"Keycloak vulnerable to privilege escalation on Token Exchange feature","id":"CVE-2022-1245","kev_date_added":null,"published":"2022-07-07"},{"cvss_score":9.6,"headline":"keycloak Self Stored Cross-site Scripting vulnerability","id":"CVE-2021-20195","kev_date_added":null,"published":"2021-05-28"},{"cvss_score":9.3,"headline":"Keycloak Authentication Error","id":"CVE-2019-14910","kev_date_added":null,"published":"2019-12-05"},{"cvss_score":9.3,"headline":"Keycloak Authentication Error","id":"CVE-2019-14909","kev_date_added":null,"published":"2019-12-04"},{"cvss_score":9.1,"headline":"Keycloak vulnerable to path traversal via double URL encoding","id":"CVE-2022-3782","kev_date_added":null,"published":"2023-01-11"},{"cvss_score":9.1,"headline":"keycloak vulnerable to unauthorized login via mail server setup","id":"CVE-2019-14837","kev_date_added":null,"published":"2020-01-07"}],"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":["n/a"]},"summary":"Attackers can read arbitrary files accessible to the classloader by manipulating theme resource requests, exposing sensitive data.","url":"https://insights.sbomify.com/CVE-2021-3856/"}