CVE-2025-64781

Published Dec 12, 2025 CVSS 4.0 · 5.1 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:2.3:a:groupsession:groupsession:*:*:*:*:bycloud:*:*:*
cpe:2.3:a:groupsession:groupsession:*:*:*:*:free:*:*:*
cpe:2.3:a:groupsession:groupsession:*:*:*:*:zion:*:*:*
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Groupsession
Groupsession groupsession
Groupsession groupsession Bycloud
Groupsession groupsession Zion
Vendors & Products Groupsession
Groupsession groupsession
Groupsession groupsession Bycloud
Groupsession groupsession Zion
Type Values Removed Values Added
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.
Weaknesses CWE-1188
References
Metrics cvssV3_0

{'score': 4.7, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N'}

cvssV4_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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
jpcert
Published
Updated
Dec 12, 2025, 8:26 PM
Reserved
Nov 27, 2025, 5:42 AM
Status
Analyzed
Published
Dec 12, 2025, 5:16 AM
Modified
Oct 7, 2026, 8:10 PM