NodeBB does not bind the claimed author of an inbound ActivityPub object to the authenticated remote actor. The inbound middleware verifies the HTTP-signature actor and checks the origin of object.id, but never validates that attributedTo corresponds to the sender. In the object mock, attributedTo is used directly as a uid, and actors.assert silently ignores numeric identifiers (filtering them out without re-deriving the uid), so a federated remote actor can set attributedTo to a bare numeric value such as 1 and have the resulting post or private message created with that local uid as author, including the administrator account. This lets a remote attacker forge posts and direct messages attributed to arbitrary local users. Requires the ActivityPub/federation feature to be enabled.
CVSS Score
8.7
EPSS Score
0.002
Published
2026-07-01
NodeBB v4.3.0 is vulnerable to SQL injection in its search-categories API endpoint (/api/v3/search/categories). The search query parameter is not properly sanitized, allowing unauthenticated, remote attackers to inject boolean-based blind and PostgreSQL error-based payloads.
CVSS Score
8.6
EPSS Score
0.081
Published
2025-08-27