Public exploit details show how CVE-2026-61511 reaches PHP eval() in unpatched vBulletin forums through a visitor-controlled template value.

Public exploit details show how CVE-2026-61511 reaches PHP eval() in unpatched vBulletin forums through a visitor-controlled template value.

A critical vulnerability in the vBulletin forum software allows unauthenticated attackers to execute arbitrary PHP code through template rendering.