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Medium severity4.8NVD Advisory· Published Jul 30, 2021· Updated Jun 17, 2026

CVE-2021-20787

CVE-2021-20787

Description

Cross-site scripting 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 inject an arbitrary script by sending a specially crafted request to a specific 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: ver3.0.3 to ver5.1.0
  • 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: ver3.0.3 to ver5.1.0
  • Japan Total System Co.,ltd./GroupSession Free editionllm-create
    Range: ver2.2.0 to ver5.1.0

Patches

Vulnerability mechanics

References

2

News mentions

0

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