CVE-2018-16613

Vulnerability

The wpForo Forum plugin before version 1.5.2 contains a privilege escalation flaw in its update function. A registered forum user can exploit this to become forum administrator without requiring any user interaction. The vulnerability resides in the plugin's code path that handles user role updates, allowing unauthorized role elevation. Affected versions include all releases prior to 1.5.2, as confirmed by the vendor's advisory [1] and the CVE description [2].

Exploitation

Exploitation requires only that the attacker be a registered forum user with basic access. No special network position, authentication bypass, or race window is needed. The attacker simply triggers the vulnerable update function via the forum's normal operations, which silently escalates their role to administrator. The exact sequence involves invoking the update mechanism without any additional privileges or user interaction, as the flaw operates automatically upon certain conditions [1][2].

Impact

A successful exploit grants the attacker full forum administrator privileges. This includes complete control over forum settings, user management, content moderation, and all administrative functions. The compromise is total, with no scope limitations — the attacker gains unrestricted authority within the forum environment, leading to potential data breaches, content manipulation, and disruption of community operations [1][2].

Mitigation

The vulnerability is fixed in wpForo version 1.5.2, released on 060918 according to the vendor's timeline [1]. Users must update to this patched version immediately. No workarounds are available; the only mitigation is applying the official patch. The plugin's EOL status is not indicated, but active support suggests continued maintenance. The CVE is not listed in KEV, but urgency is high given the privilege escalation impact [1][2].