[ZBX-20350] Unsafe client-side session storage leading to authentication bypass / instance takeover via Zabbix Frontend with configured SAML (CVE-2022-23131) - ZABBIX SUPPORT

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CVE number	CVE-2022-23131
CVSS score	9.1
Severity	Critical
Summary	Unsafe client-side session storage leading to authentication bypass/instance takeover via Zabbix Frontend with configured SAML
Description	In the case of instances where the SAML SSO authentication is enabled (non-default), session data can be modified by a malicious actor, because a user login stored in the session was not verified.
Known attack vectors	Malicious unauthenticated actor may exploit this issue to escalate privileges and gain admin access to Zabbix Frontend. To perform the attack, SAML authentication is required to be enabled and the actor has to know the username of Zabbix user (or use the guest account, which is disabled by default).
Resolution	To remediate this vulnerability, apply the updates listed in the 'Fixed Version' section to appropriate products or if an immediate update is not possible, follow the presented below workarounds.
Acknowledgements	Zabbix wants to thank Thomas Chauchefoin from SonarSource for reporting this issue to us
Affected versions	5.4.0 - 5.4.8 6.0.0alpha1
Workarounds	Disable SAML authentication

causes

ZBX-20377 Broken scheduled reports