{"id":"CVE-2025-61987","aliases":["EUVD-2025-203021","GHSA-r3gq-2jpg-6v2w"],"status":"published","title":"GroupSession Free edition prior to ver5.3.0, GroupSession byCloud prior to ver5.3.3, and...","description":"GroupSession Free edition prior to ver5.3.0, GroupSession byCloud prior to ver5.3.3, and GroupSession ZION prior to ver5.3.2. do not validate origins in WebSockets. If a user accesses a crafted page, Chat information sent to the user may be exposed.","severity":{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00163,"percentile":0.05617,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-1385"],"published":"2025-12-12T05:02:22Z","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-2025-61987"},{"url":"https://jvn.jp/en/jp/JVN19940619"},{"url":"https://github.com/advisories/GHSA-r3gq-2jpg-6v2w"}],"sources":{"cve":[{"id":"CVE-2025-61987","description":"GroupSession Free edition prior to ver5.3.0, GroupSession byCloud prior to ver5.3.3, and GroupSession ZION prior to ver5.3.2. do not validate origins in WebSockets. If a user accesses a crafted page, Chat information sent to the user may be exposed.","status":"published","published":"2025-12-12T05:02:22.443Z","modified":"2025-12-12T20:22:14.823Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"},{"version":"3.0","score":5.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-1385"],"updated_at":"2026-11-02T14:32:45.105469Z"}],"euvd":[{"id":"EUVD-2025-203021","description":"GroupSession Free edition prior to ver5.3.0, GroupSession byCloud prior to ver5.3.3, and GroupSession ZION prior to ver5.3.2. do not validate origins in WebSockets. If a user accesses a crafted page, Chat information sent to the user may be exposed.","status":"published","published":"2025-12-12T05:02:22Z","modified":"2025-12-12T20:22:14Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T19:49:05.447386Z"}],"ghsa":[{"id":"GHSA-r3gq-2jpg-6v2w","title":"GroupSession Free edition prior to ver5.3.0, GroupSession byCloud prior to ver5.3.3, and...","description":"GroupSession Free edition prior to ver5.3.0, GroupSession byCloud prior to ver5.3.3, and GroupSession ZION prior to ver5.3.2. do not validate origins in WebSockets. If a user accesses a crafted page, Chat information sent to the user may be exposed.","status":"published","published":"2025-12-12T06:31:14Z","modified":"2025-12-12T06:31:14Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/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":5.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"cwes":["CWE-1385"],"updated_at":"2026-11-02T15:05:10.314009Z"}],"nvd":[{"id":"CVE-2025-61987","description":"GroupSession Free edition prior to ver5.3.0, GroupSession byCloud prior to ver5.3.3, and GroupSession ZION prior to ver5.3.2. do not validate origins in WebSockets. If a user accesses a crafted page, Chat information sent to the user may be exposed.","status":"published","published":"2025-12-12T05:16:07.763Z","modified":"2026-10-07T20:10:01.97Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/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":5.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-1385"],"updated_at":"2026-11-02T14:11:49.861863Z"}]}}