CVE-2026-70556

Description

Hubzilla versions prior to 11.4 contains a cross-site request forgery vulnerability in the OAuth2 /authorize endpoint handled by Zotlabs\Module\Authorize::post() that allows unauthenticated attackers to register arbitrary OAuth2 applications under an authenticated user's account by submitting a cross-origin POST request without CSRF token or Origin/Referer validation. Attackers can craft a malicious HTML form that autosubmits attacker-chosen OAuth2 parameters including client_id, client_secret, redirect_uri, and scope to silently register a persistent OAuth2 application, enabling interception of future OAuth2 authorization codes when the victim later authenticates against the attacker-controlled client.

Weakness classification

• disclosure@vulncheck.com: CWE-352

Primary references

• disclosure@vulncheck.com
• disclosure@vulncheck.com
• disclosure@vulncheck.com
• disclosure@vulncheck.com
• 134c704f-9b21-4f2e-91b3-4a467353bcc0