The lollms application suffers from an insecure direct object reference that allows any authenticated user to accept or reject friend requests that belong to other users. The backend route handling these requests does not validate that the caller is a participant of the friendship or the intended recipient, enabling direct manipulation of others’ social connections. This flaw can lead to privacy violations, social engineering opportunities, and potential reputational harm. The weakness corresponds to CWE-863.

All installations of parisneo/lollms up to and including version 2.2.0 are vulnerable. The issue was addressed in the 2.2.0 release, so any deployment running 2.2.0 or earlier should apply the update.

The vulnerability carries a CVSS score of 8.3, indicating high severity. EPSS data is unavailable, and the issue is not listed in the KEV catalog, yet the high score reflects that an attacker only needs valid credentials to exploit the flaw. An authenticated user can issue a single HTTP request to the vulnerable endpoint, changing the state of a foreign friend request. Consequently, the risk remains elevated, especially in environments where user accounts may be compromised or malicious insiders exist.