An issue was discovered in AgileBits 1Password, involving the method various 1Password apps and integrations used to create connections to the 1Password service. In specific circumstances, this issue allowed a malicious server to convince a 1Password app or integration it is communicating with the 1Password service.
1Password for Mac 7.2.4 through 7.9.x before 7.9.3 is vulnerable to a process validation bypass. Malicious software running on the same computer can exfiltrate secrets from 1Password provided that 1Password is running and is unlocked. Affected secrets include vault items and derived values used for signing in to 1Password.
The Safari app extension bundled with 1Password for Mac 7.7.0 through 7.8.x before 7.8.7 is vulnerable to authorization bypass. By targeting a vulnerable component of this extension, a malicious web page could read a subset of 1Password vault items that would normally be fillable by the user on that web page. These items are usernames and passwords for vault items associated with its domain, usernames and passwords without a domain association, credit cards, and contact items. (1Password must be unlocked for these items to be accessible, but no further user interaction is required.)