{"answers":{"affected":"2 open source packages ship an affected version, including org.keycloak:keycloak-core. It affects 2 products.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-27838 exists.","fix":"Upgrade org.keycloak:keycloak-core to 13.0.0 or later.","what":"CVE-2020-27838 is a medium-severity vulnerability in Redhat Keycloak, published on 8 Mar 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2020-27838 and fix it if it is affected.\n\nWhat it is: CVE-2020-27838 is a medium-severity vulnerability in Redhat Keycloak, published on 8 Mar 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-27838 exists.\n\nAffected packages and fixed versions:\n- org.keycloak:keycloak-core (Maven): affected all versions; fixed in 13.0.0\n- org.keycloak:keycloak-core (Maven): affected all versions; fixed in 13.0.0\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-2020-27838/ (Markdown: https://insights.sbomify.com/CVE-2020-27838/index.md)","id":"CVE-2020-27838","markdown":"https://insights.sbomify.com/CVE-2020-27838/index.md","name":"CVE-2020-27838","record":{"aliases":["GHSA-pcv5-m2wh-66j3"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Keycloak identity server","requires_auth":"none","summary":"Unauthenticated attackers can retrieve sensitive client secrets from public clients, potentially compromising confidentiality if clients later become confidential.","user_interaction":"required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"keycloak","vendor":"redhat"},{"product":"single_sign-on","vendor":"redhat"}],"cvss":{"score":6.5,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-287","name":"Improper Authentication"}],"description":"A flaw was found in keycloak in versions prior to 13.0.0. The client registration endpoint allows fetching information about PUBLIC clients (like client secret) without authentication which could be an issue if the same PUBLIC client changed to CONFIDENTIAL later. The highest threat from this vulnerability is to data confidentiality.","ecosystems":["Maven"],"exploits":{"exploitdb":0,"first_seen":"2024-05-14","github_poc":1,"max_poc_stars":3,"metasploit":0,"nuclei":1,"refs":[{"date":"2024-05-14T15:50:16Z","kind":"github_poc","ref":"https://github.com/Cappricio-Securities/CVE-2020-27838","stars":3,"title":"CVE-2020-27838 - KeyCloak - Information Exposure "},{"date":null,"kind":"nuclei","ref":"http/cves/2020/CVE-2020-27838.yaml","stars":null,"title":"KeyCloak - Information Exposure"}],"tier":"weaponised"},"has_fix":true,"headline":"Keycloak discloses information without authentication","id":"CVE-2020-27838","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":"redhat:keycloak","products":["redhat:keycloak","redhat:single_sign-on"],"type":"information_disclosure","year":"2020"},"n_packages":2,"n_references":1,"next":{"headline":"Information disclosure in ceph-dashboard","id":"CVE-2020-27839"},"packages":[{"ecosystem":"Maven","fixed":["13.0.0"],"introduced":["0"],"last_affected":[],"package":"org.keycloak:keycloak-core","purl":null,"source":"GHSA-pcv5-m2wh-66j3"},{"ecosystem":"Maven","fixed":["13.0.0"],"introduced":["0"],"last_affected":[],"package":"org.keycloak:keycloak-core","purl":"pkg:maven/org.keycloak/keycloak-core","source":"GHSA-pcv5-m2wh-66j3"}],"prev":{"headline":"Race condition in gdm","id":"CVE-2020-27837"},"products":["keycloak"],"published":"2021-03-08","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)"},{"class":"attribution","licence":"MIT","name":"Nuclei templates"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-04","vendors":["n/a"]},"summary":"Unauthenticated attackers can retrieve sensitive client secrets from public clients, potentially compromising confidentiality if clients later become confidential.","url":"https://insights.sbomify.com/CVE-2020-27838/"}