{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-20874 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-20874 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-20874 is a high-severity missing authorization vulnerability in Japan Total System Co.,Ltd. GroupSession Free edition, GroupSession byCloud, GroupSession ZION, published on 24 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-20874 and fix it if it is affected.\n\nWhat it is: CVE-2021-20874 is a high-severity missing authorization vulnerability in Japan Total System Co.,Ltd. GroupSession Free edition, GroupSession byCloud, GroupSession ZION, published on 24 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-20874 in the wild and no public exploit code.\n\nAffected product: Japan Total System Co.,Ltd. GroupSession Free edition, GroupSession byCloud, GroupSession ZION. 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-2021-20874/ (Markdown: https://insights.sbomify.com/CVE-2021-20874/index.md)","id":"CVE-2021-20874","markdown":"https://insights.sbomify.com/CVE-2021-20874/index.md","name":"CVE-2021-20874","record":{"aliases":["GHSA-4xfx-j5qc-9qj6"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"GroupSession collaboration software","requires_auth":"none","summary":"Remote unauthenticated attackers can access arbitrary files and obtain sensitive information due to incorrect permission assignments in GroupSession.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"jpcert","cpe":[{"product":"groupsession","vendor":"groupsession"}],"cvss":{"score":7.5,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-732","name":"Incorrect Permission Assignment for Critical Resource"}],"description":"Incorrect permission assignment for critical resource vulnerability in GroupSession Free edition ver5.1.1 and earlier, GroupSession byCloud ver5.1.1 and earlier, and GroupSession ZION ver5.1.1 and earlier allows a remote unauthenticated attacker to access arbitrary files on the server and obtain sensitive information via unspecified vectors.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Missing authorization in GroupSession Free edition, GroupSession byCloud, GroupSession ZION","id":"CVE-2021-20874","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"missing_authorization","year":"2021"},"n_packages":0,"n_references":2,"next":{"headline":"Open redirect in GroupSession Free edition, GroupSession byCloud, GroupSession ZION","id":"CVE-2021-20875"},"packages":[],"prev":{"headline":"Missing authorization in Yappli","id":"CVE-2021-20873"},"products":["GroupSession Free edition, GroupSession byCloud, GroupSession ZION"],"published":"2021-12-24","related":[{"cvss_score":6.9,"headline":"Cross-site request forgery in GroupSession Free edition","id":"CVE-2025-61987","kev_date_added":null,"published":"2025-12-12"},{"cvss_score":6.8,"headline":"Path traversal in GroupSession Free edition, GroupSession byCloud, GroupSession ZION","id":"CVE-2021-20876","kev_date_added":null,"published":"2021-12-24"},{"cvss_score":6.5,"headline":"Information disclosure in GroupSession","id":"CVE-2017-2165","kev_date_added":null,"published":"2017-06-09"},{"cvss_score":6.1,"headline":"Open redirect in GroupSession Free edition, GroupSession byCloud, GroupSession ZION","id":"CVE-2021-20875","kev_date_added":null,"published":"2021-12-24"},{"cvss_score":6.1,"headline":"Open redirect in GroupSession","id":"CVE-2021-20789","kev_date_added":null,"published":"2021-07-28"},{"cvss_score":6.1,"headline":"Open redirect in GroupSession","id":"CVE-2017-2166","kev_date_added":null,"published":"2018-01-26"}],"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":["Japan Total System Co.,Ltd."]},"summary":"Remote unauthenticated attackers can access arbitrary files and obtain sensitive information due to incorrect permission assignments in GroupSession.","url":"https://insights.sbomify.com/CVE-2021-20874/"}