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CVE-2021-20786 Cross-site request forgery in GroupSession

Medium 4.3 Published Updated

A CSRF vulnerability in GroupSession allows remote attackers to hijack administrator sessions via crafted URLs, requiring an upgrade to secure the application.

Exploited in the wild
Not known
Login needed
Not needed
Attackable
Over the internet
Victim action needed
A user has to click or open something
Fix
None listed

What is CVE-2021-20786?

CVE-2021-20786 is a medium-severity vulnerability in Japan Total System Co.,Ltd. GroupSession, published on 28 Jul 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Cross-site request forgery (CSRF) 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 hijack the authentication of administrators via a specially crafted URL.

Weakness: CWE-352

Which versions are affected by CVE-2021-20786?

It affects 3 products.

Products include Groupsession Groupsession, Groupsession Groupsession Bycloud, Groupsession Groupsession Zion.

How do I fix CVE-2021-20786?

No fix has been published for CVE-2021-20786 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-20786 being exploited?

There is no known exploitation of CVE-2021-20786 in the wild and no public exploit code.

Sources

Also known as GHSA-crxm-j8cj-fgm7.

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