Insufficient Session Expiration in Pterodactyl API
Impact
A vulnerability exists in Pterodactyl Panel <= 1.6.6 that could allow a malicious attacker that compromises an API key to generate an authenticated user session that is not revoked when the API key is deleted, thus allowing the malicious user to remain logged in as the user the key belonged to.
It is important to note that a malicious user must first compromise an existing API key for a user to exploit this issue. It cannot be exploited by chance, and requires a coordinated attack against an individual account using a known API key.
Patches
This issue has been addressed in the v1.7.0 release of Pterodactyl Panel.
Workarounds
Those not wishing to upgrade may apply the change below:
diff --git a/app/Http/Middleware/Api/AuthenticateKey.php b/app/Http/Middleware/Api/AuthenticateKey.php
index eb25dac6..857bfab2 100644
--- a/app/Http/Middleware/Api/AuthenticateKey.php
+++ b/app/Http/Middleware/Api/AuthenticateKey.php
@@ -70,7 +70,7 @@ class AuthenticateKey
} else {
$model = $this->authenticateApiKey($request->bearerToken(), $keyType);
- $this->auth->guard()->loginUsingId($model->user_id);
+ $this->auth->guard()->onceUsingId($model->user_id);
}
For more information
If you have any questions or comments about this advisory please reach out to Tactical Fish#8008 on Discord or email dane@pterodactyl.io.
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A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.
CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.
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Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.
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