{"id":"CVE-2025-64781","aliases":["EUVD-2025-203018","GHSA-778m-x6m8-v6h8"],"status":"published","title":"In GroupSession Free edition prior to ver5.7.1, GroupSession byCloud prior to ver5.7.1, and...","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.","severity":{"version":"4.0","score":5.1,"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","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00207,"percentile":0.10914,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-1188"],"published":"2025-12-12T05:02:58Z","modified":"2026-10-07T20:10:01Z","products":[{"vendor":"groupsession","product":"groupsession"},{"vendor":"japan total system co.,ltd.","product":"groupsession bycloud"},{"vendor":"japan total system co.,ltd.","product":"groupsession free edition"},{"vendor":"japan total system co.,ltd.","product":"groupsession zion"}],"references":[{"url":"https://groupsession.jp/info/info-news/security20251208","tags":["Vendor Advisory"]},{"url":"https://jvn.jp/en/jp/JVN19940619/","tags":["Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-64781"},{"url":"https://jvn.jp/en/jp/JVN19940619"},{"url":"https://github.com/advisories/GHSA-778m-x6m8-v6h8"}],"sources":{"cve":[{"id":"CVE-2025-64781","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.","status":"published","published":"2025-12-12T05:02:58.824Z","modified":"2025-12-12T20:26:03.855Z","cvss":[{"version":"4.0","score":5.1,"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","level":"medium","assessor":"cna"},{"version":"3.0","score":4.7,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-1188"],"updated_at":"2026-11-02T14:32:46.750177Z"}],"euvd":[{"id":"EUVD-2025-203018","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.","status":"published","published":"2025-12-12T05:02:58Z","modified":"2025-12-12T20:26:03Z","cvss":[{"version":"4.0","score":5.1,"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","level":"medium"}],"updated_at":"2026-11-02T19:49:05.447386Z"}],"ghsa":[{"id":"GHSA-778m-x6m8-v6h8","title":"In GroupSession Free edition prior to ver5.7.1, GroupSession byCloud prior to ver5.7.1, and...","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.","status":"published","published":"2025-12-12T06:31:14Z","modified":"2025-12-12T06:31:21Z","cvss":[{"version":"4.0","score":5.1,"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"},{"version":"3.0","score":4.7,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N","level":"medium"}],"cwes":["CWE-1188"],"updated_at":"2026-11-02T15:05:10.854333Z"}],"nvd":[{"id":"CVE-2025-64781","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.","status":"published","published":"2025-12-12T05:16:11.623Z","modified":"2026-10-07T20:10:01.97Z","cvss":[{"version":"4.0","score":5.1,"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"},{"version":"3.0","score":4.7,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-1188"],"updated_at":"2026-11-02T14:11:49.861863Z"}]}}