Horizon Alert
Summary of the vulnerability and why it matters
SillyTavern, a user interface for interacting with AI models, has a vulnerability related to its single sign-on (SSO) configuration. When certain SSO options are enabled, the application does not properly validate incoming HTTP headers. This flaw allows any network-connected client to impersonate any user, including administrators, without needing a password, provided direct access to the SillyTavern port is possible.
- Vulnerable application component
- Missing header validation
- Unauthorized administrator access
Attack Path
How an attacker could exploit the issue
This vulnerability allows an attacker to gain unauthorized access to the SillyTavern application by exploiting how it handles authentication headers. When specific single sign-on (SSO) features are enabled, the application may not adequately verify that these authentication headers originate from trusted sources. This could enable an attacker to impersonate legitimate users, including administrators.
- Exposed network port.
- Inject authentication headers.
- Gain administrator control.
Live Threat
Current exploitation, exposure, and threat context
This vulnerability could allow an unauthenticated attacker to gain administrative access to the SillyTavern application. Exploitation requires specific, optional Single Sign-On configurations to be enabled. Attackers could potentially impersonate any user, including administrators, without needing a password.
- Attackers need no technical skill.
- Specific SSO features must be enabled.
- Business risk is high if SSO is active.
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
The identified vulnerability in SillyTavern could allow unauthorized access to user accounts, including administrative privileges, without requiring a password if specific Single Sign-On (SSO) configurations are enabled. This could lead to unauthorized data access, modification, or system compromise. The risk is present only when the optional `sso.autheliaAuth` or `sso.authentikAuth` settings are activated in the configuration.
- Identify assets with the SSO configuration enabled.
- Disable optional SSO configurations if not actively used.
- Update the software to the fixed version.
