This version (released August 12th) addresses additional scenarios in the critical security vulnerability that was fixed with versions issued on July 29th. This is expected to be the final fix.
To allow upgrades to a fix version without major upgrades in the Atlassian application, all public versions in the marketplace will include the fix to the security vulnerability.
Please reference the version history for the most relevant version for your instance. https://marketplace.atlassian.com/apps/1219441/saml-single-sign-on-saml-sso-fisheye/version-history
Please refer to this wiki page for the latest status: https://wiki.resolution.de/doc/saml-sso/latest/jira/security-advisories/2021-07-29-authentication-bypass-network-attacker-can-login-to-users-accounts-when-usernames-are-known