{"id":"CVE-2025-61987","title":"GroupSession Free edition prior to ver5.3.0, GroupSession byCloud prior to ver5.3.3, and GroupSession ZION prior to ver5.3.2","summary":"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…","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","cwe":["CWE-1385"],"vendor":"groupsession","product":"groupsession","affected":["groupsession < 5.3.0","groupsession < 5.3.2","groupsession < 5.3.3"],"patched":["groupsession 5.3.3"],"published":"2025-12-12","updated":"2026-10-07","sourceUpdated":"2026-10-07T20:10:01.970","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-61987","references":[{"url":"https://groupsession.jp/info/info-news/security20251208","label":"vultures@jpcert.or.jp"},{"url":"https://jvn.jp/en/jp/JVN19940619/","label":"vultures@jpcert.or.jp"}],"tags":["nvd"],"epss":0.00151,"epssPercentile":0.03653,"ingestedAt":"2026-10-07T20:46:46.891Z","slug":"CVE-2025-61987","body":"## Overview\n\nGroupSession 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.\n\n## Affected\n\n- `groupsession < 5.3.0`\n- `groupsession < 5.3.2`\n- `groupsession < 5.3.3`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `groupsession 5.3.3`","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}