CVE-2026-1228CWE-639

Timeline Block <= 1.3.3 - Insecure Direct Object Reference to Authenticated (Author+) Private Timeline Exposure via Shortcode Attribute

Medium · published February 6, 2026

CVSS v3.1
4.3
EPSS
0%
Percentile
10.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00206 · 10.1th percentile
Weakness
CWE-639 · Authorization Bypass Through User-Controlled Key
Published
2026-02-06T02:23Z
EPSS history
Timeline
  • 06 FEB 02:23Z
    Timeline Block <= 1.3.3 - Insecure Direct Object Reference to Authenticated (Author+) Private Timeline Exposure via Shortcode Attribute
    cvelistv5