Medium severity · published Feb 6, 2026
CVE-2026-1228
Timeline Block <= 1.3.3 - Insecure Direct Object Reference to Authenticated (Author+) Private Timeline Exposure via Shortcode Attribute
4.3
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 11% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TB
Timeline Block – Beautiful Timeline Builder for WordPress (Vertical & Horizontal Timelines) · bplugins
through 1.3.3 · source: vendor
Affected product
TB
Timeline Block – Beautiful Timeline Builder for WordPress (Vertical & Horizontal Timelines)
bplugins
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-1228
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-1228
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/changeset/3446078/timeline-block-block
www.wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/cecebfd0-c2af-4150-8793-299cdbeaa7b9?source=cve