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Description

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.

PUBLISHED Reserved 2026-01-20 | Published 2026-02-06 | Updated 2026-02-06 | Assigner Wordfence




MEDIUM: 4.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Problem types

CWE-639 Authorization Bypass Through User-Controlled Key

Product status

Default status
unaffected

* (semver)
affected

Timeline

2026-01-20:Vendor Notified
2026-02-05:Disclosed

Credits

Kazuma Matsumoto finder

References

www.wordfence.com/...-c2af-4150-8793-299cdbeaa7b9?source=cve

plugins.trac.wordpress.org/...t/3446078/timeline-block-block

cve.org (CVE-2026-1228)

nvd.nist.gov (CVE-2026-1228)

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