{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-20876 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-20876 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-20876 is a medium-severity path traversal vulnerability in Japan Total System Co.,Ltd. GroupSession Free edition, GroupSession byCloud, GroupSession ZION, published on 24 Dec 2021. An attacker needs administrator access to exploit it, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-20876 and fix it if it is affected.\n\nWhat it is: CVE-2021-20876 is a medium-severity path traversal vulnerability in Japan Total System Co.,Ltd. GroupSession Free edition, GroupSession byCloud, GroupSession ZION, published on 24 Dec 2021. An attacker needs administrator access to exploit it, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-20876 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-2021-20876/ (Markdown: https://insights.sbomify.com/CVE-2021-20876/index.md)","id":"CVE-2021-20876","markdown":"https://insights.sbomify.com/CVE-2021-20876/index.md","name":"CVE-2021-20876","record":{"aliases":["GHSA-wgqf-h79v-9gc7"],"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":"high_privilege","summary":"Administrators can exploit a path traversal flaw to read sensitive files outside the web root in GroupSession collaboration software.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"jpcert","cpe":[{"product":"groupsession","vendor":"groupsession"}],"cvss":{"score":6.8,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory"}],"description":"Path traversal 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 an attacker with an administrative privilege to obtain sensitive information stored in the hierarchy above the directory on the published site's server 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":"Path traversal in GroupSession Free edition, GroupSession byCloud, GroupSession ZION","id":"CVE-2021-20876","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"path_traversal","year":"2021"},"n_packages":0,"n_references":2,"next":{"headline":"Cross-site scripting in Canon laser printers and small office multifunctional printers","id":"CVE-2021-20877"},"packages":[],"prev":{"headline":"Open redirect in GroupSession Free edition, GroupSession byCloud, GroupSession ZION","id":"CVE-2021-20875"},"products":["GroupSession Free edition, GroupSession byCloud, GroupSession ZION"],"published":"2021-12-24","related":[{"cvss_score":7.5,"headline":"Missing authorization in GroupSession Free edition, GroupSession byCloud, GroupSession ZION","id":"CVE-2021-20874","kev_date_added":null,"published":"2021-12-24"},{"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":6.5,"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":"Administrators can exploit a path traversal flaw to read sensitive files outside the web root in GroupSession collaboration software.","url":"https://insights.sbomify.com/CVE-2021-20876/"}