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Medium severity6.1NVD Advisory· Published Jul 30, 2021· Updated Jun 17, 2026

CVE-2021-20789

CVE-2021-20789

Description

Open redirect vulnerability in GroupSession (GroupSession Free edition from ver2.2.0 to the version prior to ver5.1.0, GroupSession byCloud from ver3.0.3 to the version prior to ver5.1.0, and GroupSession ZION from ver3.0.3 to the version prior to ver5.1.0) allows a remote attacker to redirect a user to an arbitrary web site and conduct a phishing attack via a specially crafted URL.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

7
  • Japan Total System Co.,ltd./Groupsession2 versions
    cpe:2.3:a:groupsession:groupsession:*:*:*:*:free:*:*:*+ 1 more
    • cpe:2.3:a:groupsession:groupsession:*:*:*:*:free:*:*:*range: >=2.20,<5.1.0
    • (no CPE)range: GroupSession Free edition from ver2.2.0 to the version prior to ver5.1.0, GroupSession byCloud from ver3.0.3 to the version prior to ver5.1.0, and GroupSession ZION from ver3.0.3 to the version prior to ver5.1.0
  • Japan Total System Co.,ltd./Groupsession Bycloud2 versions
    cpe:2.3:a:groupsession:groupsession_bycloud:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:a:groupsession:groupsession_bycloud:*:*:*:*:*:*:*:*range: >=3.0.3,<5.1.0
    • (no CPE)range: 3.0.3 - 5.0.9
  • Japan Total System Co.,ltd./Groupsession Zion2 versions
    cpe:2.3:a:groupsession:groupsession_zion:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:a:groupsession:groupsession_zion:*:*:*:*:*:*:*:*range: >=3.0.3,<5.1.0
    • (no CPE)range: 3.0.3 - 5.0.9
  • Japan Total System Co.,ltd./GroupSession Free editionllm-create
    Range: 2.2.0 - 5.0.9

Patches

Vulnerability mechanics

References

2

News mentions

0

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