CVE-2026-1228: Bplugins Timeline Block – Beautiful Timeline Builder For WordPress Vertical & Horizontal Timelines

Medium severity, CVSS 4.3. EPSS: 0.2% chance of exploitation in the next 30 days.

The Timeline Block – Beautiful Timeline Builder for WordPress (Vertical & Horizontal Timelines) plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 1.3.3 via the tlgb_shortcode() function due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with Author-level access and above, to disclose private timeline content via the id attribute supplied to the 'timeline_block' shortcode.

Affected products

• Bplugins Timeline Block – Beautiful Timeline Builder For WordPress Vertical & Horizontal Timelines: up to and including 1.3.3

Published 2026-02-06. Last modified 2026-06-17.