Timeline Block <= 1.3.3 — Insecure Direct Object Reference to Authenticated (Author+) Private Timeline Exposure via Shortcode Attribute
CVE-2026-1228Published · Updated Action summary
Affected: ≤1.3.3Update to 1.3.4 or newer
All remediation steps- Severity
- Medium4.3
- CVSS
- 4.3CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:LPrivileges required- Low
UI:NUser interaction- None
S:UScope- Unchanged
C:LConfidentiality- Low
I:NIntegrity- None
A:NAvailability- None
- Required access
- Unknown
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
Timeline Block – tell your story with elegant timelines timeline-block-block
- Affected≤ 1.3.3
- Patched in1.3.4
Update to 1.3.4 or newer.
You are affected if you run ≤ 1.3.3. Version 1.3.4 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Timeline Block – tell your story with elegant timelines.
- No admin access? Run a passive check of your site. It reads public files only.
What to do
- Update to version 1.3.4, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Timeline Block – tell your story with elegant timelines to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Kazuma Matsumoto.
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.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in Timeline Block – tell your story with elegant timelines
All 2| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium6.4 | Authenticated (Contributor+) Stored Cross-Site Scripting ≤1.1.1Update to 1.1.3 | CVE-2025-26754 |
- Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting
≤1.1.1Update to 1.1.3
Timeline
CVE published
Severity medium, CVSS 4.3
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.