{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2025-64781 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2025-64781 yet. Limit exposure of the affected software until one is available.","what":"CVE-2025-64781 is a medium-severity vulnerability in Japan Total System Co.,Ltd. GroupSession Free edition, published on 12 Dec 2025. 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-2025-64781 and fix it if it is affected.\n\nWhat it is: CVE-2025-64781 is a medium-severity vulnerability in Japan Total System Co.,Ltd. GroupSession Free edition, published on 12 Dec 2025. 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-2025-64781 in the wild and no public exploit code.\n\nAffected product: Japan Total System Co.,Ltd. GroupSession Free edition. 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-2025-64781/ (Markdown: https://insights.sbomify.com/CVE-2025-64781/index.md)","id":"CVE-2025-64781","markdown":"https://insights.sbomify.com/CVE-2025-64781/index.md","name":"CVE-2025-64781","record":{"aliases":["GHSA-778m-x6m8-v6h8"],"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":"Attackers can redirect users to arbitrary websites via crafted URLs due to insecure default external page display restrictions in GroupSession.","user_interaction":"required","vuln_class":"open_redirect"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"jpcert","cpe":[{"product":"groupsession","vendor":"groupsession"}],"cvss":{"score":5.1,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-1188","name":"Initialization of a Resource with an Insecure Default"}],"description":"In GroupSession Free edition prior to ver5.7.1, GroupSession byCloud prior to ver5.7.1, and GroupSession ZION prior to ver5.7.1, \"External page display restriction\" is set to \"Do not limit\" in the initial configuration. With this configuration, the user may be redirected to an arbitrary website when accessing 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","id":"CVE-2025-64781","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"open_redirect","year":"2025"},"n_packages":0,"n_references":2,"next":{"headline":"DNG SDK | Integer Overflow or Wraparound (CWE-190)","id":"CVE-2025-64783"},"packages":[],"prev":{"headline":"Mirion Medical EC2 Software NMIS BioDose Use of Hard-coded Credentials","id":"CVE-2025-64778"},"products":["GroupSession Free edition","GroupSession ZION","GroupSession byCloud"],"published":"2025-12-12","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 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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2025-12-12","vendors":["Japan Total System Co.,Ltd."]},"summary":"Attackers can redirect users to arbitrary websites via crafted URLs due to insecure default external page display restrictions in GroupSession.","url":"https://insights.sbomify.com/CVE-2025-64781/"}