{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-20875 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-20875 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-20875 is a medium-severity 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, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2021-20875 and fix it if it is affected.\n\nWhat it is: CVE-2021-20875 is a medium-severity 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, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2021-20875 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-2021-20875/ (Markdown: https://insights.sbomify.com/CVE-2021-20875/index.md)","id":"CVE-2021-20875","markdown":"https://insights.sbomify.com/CVE-2021-20875/index.md","name":"CVE-2021-20875","record":{"aliases":["GHSA-vj52-jgg8-wg96"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"GroupSession collaboration","requires_auth":"none","summary":"Remote attackers can redirect users to malicious sites via crafted URLs, facilitating phishing attacks against GroupSession users.","user_interaction":"required","vuln_class":"open_redirect"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"jpcert","cpe":[{"product":"groupsession","vendor":"groupsession"}],"cvss":{"score":6.1,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-601","name":"URL Redirection to Untrusted Site"}],"description":"Open redirect 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 redirect users to arbitrary web sites and conduct phishing attacks by having a user to access a specially crafted URL.","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":"Open redirect in GroupSession Free edition, GroupSession byCloud, GroupSession ZION","id":"CVE-2021-20875","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"open_redirect","year":"2021"},"n_packages":0,"n_references":2,"next":{"headline":"Path traversal in GroupSession Free edition, GroupSession byCloud, GroupSession ZION","id":"CVE-2021-20876"},"packages":[],"prev":{"headline":"Missing authorization in GroupSession Free edition, GroupSession byCloud, GroupSession ZION","id":"CVE-2021-20874"},"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":6.8,"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","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 attackers can redirect users to malicious sites via crafted URLs, facilitating phishing attacks against GroupSession users.","url":"https://insights.sbomify.com/CVE-2021-20875/"}