{"answers":{"affected":"2 open source packages ship an affected version, including org.jenkins-ci.plugins:matrix-auth. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-21623 in the wild and no public exploit code.","fix":"Upgrade org.jenkins-ci.plugins:matrix-auth to 2.6.6 or later.","what":"CVE-2021-21623 is a medium-severity missing authorization vulnerability in Jenkins Matrix Authorization Strategy Plugin, published on 18 Mar 2021. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-21623 and fix it if it is affected.\n\nWhat it is: CVE-2021-21623 is a medium-severity missing authorization vulnerability in Jenkins Matrix Authorization Strategy Plugin, published on 18 Mar 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-2021-21623 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- org.jenkins-ci.plugins:matrix-auth (Maven): affected all versions; fixed in 2.6.6\n- org.jenkins-ci.plugins:matrix-auth (Maven): affected all versions; fixed in 2.6.6\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-2021-21623/ (Markdown: https://insights.sbomify.com/CVE-2021-21623/index.md)","id":"CVE-2021-21623","markdown":"https://insights.sbomify.com/CVE-2021-21623/index.md","name":"CVE-2021-21623","record":{"aliases":["GHSA-96jw-3xw4-mq9p"],"analysis":{"component_type":"cms_plugin","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Jenkins authorization plugin","requires_auth":"low_privilege","summary":"Attackers with read access to nested items can bypass parent folder restrictions to view unauthorized content in Jenkins.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"jenkins","cpe":[{"product":"matrix_authorization_strategy","vendor":"jenkins"}],"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-863","name":"Incorrect Authorization"}],"description":"An incorrect permission check in Jenkins Matrix Authorization Strategy Plugin 2.6.5 and earlier allows attackers with Item/Read permission on nested items to access them, even if they lack Item/Read permission for parent folders.","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":"Incorrect permission checks in Jenkins Matrix Authorization Strategy Plugin may allow accessing some items","id":"CVE-2021-21623","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":null,"products":[],"type":"missing_authorization","year":"2021"},"n_packages":2,"n_references":2,"next":{"headline":"Incorrect permission checks in Jenkins Role-based Authorization Strategy Plugin may allow accessing some items","id":"CVE-2021-21624"},"packages":[{"ecosystem":"Maven","fixed":["2.6.6"],"introduced":["0"],"last_affected":[],"package":"org.jenkins-ci.plugins:matrix-auth","purl":null,"source":"GHSA-96jw-3xw4-mq9p"},{"ecosystem":"Maven","fixed":["2.6.6"],"introduced":["0"],"last_affected":[],"package":"org.jenkins-ci.plugins:matrix-auth","purl":"pkg:maven/org.jenkins-ci.plugins/matrix-auth","source":"GHSA-96jw-3xw4-mq9p"}],"prev":{"headline":"Stored XSS vulnerability in Jenkins Artifact Repository Parameter Plugin","id":"CVE-2021-21622"},"products":["Jenkins Matrix Authorization Strategy Plugin"],"published":"2021-03-18","related":[{"cvss_score":6.5,"headline":"Jenkins Matrix Authorization Strategy Plugin: Unsafe deserialization allows invocation of parameterless constructors","id":"CVE-2026-42521","kev_date_added":null,"published":"2026-04-29"},{"cvss_score":5.4,"headline":"Stored XSS vulnerability in Jenkins Matrix Authorization Strategy Plugin","id":"CVE-2020-2226","kev_date_added":null,"published":"2020-07-15"}],"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":["Jenkins project"]},"summary":"Attackers with read access to nested items can bypass parent folder restrictions to view unauthorized content in Jenkins.","url":"https://insights.sbomify.com/CVE-2021-21623/"}