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1 vulnerability found for Hubzilla by Hubzilla
CVE-2026-70556 (GCVE-0-2026-70556)
Vulnerability from cvelistv5 – Published: 2026-08-06 12:10 – Updated: 2026-09-24 14:18
VLAI
EPSS
VEX
Title
Hubzilla version prior to 11.4 CSRF via OAuth2 /authorize Endpoint App Registration
Summary
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.
Severity
4.3 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-06 14:07 UTC
CWE
- CWE-352 - Cross-Site Request Forgery (CSRF)
Assigner
VulnCheck
CNA
References
4 references
| URL | Tags |
|---|---|
| https://framagit.org/hubzilla/core | product |
| https://hub.volse.no/cloud/harald/Skjermopptak_20… | technical-description |
| https://framagit.org/hubzilla/core/-/blob/dev/Zot… | patch |
| https://www.vulncheck.com/advisories/hubzilla-csr… | third-party-advisory |
Impacted products
Date Public
2026-08-06 00:00
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