Premium Addons for KingComposer <= 1.1.1 - Missing Authorization to Unauthenticated Arbitrary Custom Sidebar Creation and Deletion via 'add_custom_sidebar' and 'remove_custom_sidebar' AJAX actions
Published Jun 30, 2026
5.3
MEDIUMCVSS 3.1
EPSS 0.42%
Description
The Premium Addons for KingComposer plugin for WordPress is vulnerable to unauthorized modification and loss of data in versions up to, and including, 1.1.1. This is due to missing authorization and capability checks on the add_custom_sidebar() and remove_custom_sidebar() AJAX handlers, both of which are exposed through wp_ajax_nopriv_* hooks and write directly to the octagon_custom_sidebar option via update_option(). This makes it possible for unauthenticated attackers to create arbitrary custom widget areas or delete existing custom sidebars, which can cause widgets assigned to those areas to silently lose their registration and stop rendering.
Affected products
-
- Version 0StatusaffectedConstraints<=1.1.1
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Octagonwebstudio | Premium Addons for KingComposer | unaffected |
|
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
YesTechnical Impact
PartialDecision
n/aAssessed Jul 1, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
Jun–Oct 2026- EPSS v5
Percentile over time
- EPSS v5
Table of values (2 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.42% (0.00416) | 33.54th | v5 (v2026.06.15) |
| Jun 30, 2026 | 0.24% (0.00239) | 14.91th | v5 (v2026.06.15) |
References (6)
- https://plugins.trac.wordpress.org/browser/premium-addons-for-kingcomposer/trunk/core/class-sidebar.php#L100
- https://plugins.trac.wordpress.org/browser/premium-addons-for-kingcomposer/trunk/core/class-sidebar.php#L23
- https://plugins.trac.wordpress.org/browser/premium-addons-for-kingcomposer/trunk/core/class-sidebar.php#L68
- https://plugins.trac.wordpress.org/browser/premium-addons-for-kingcomposer/trunk/core/class-sidebar.php#L77
- https://plugins.trac.wordpress.org/browser/premium-addons-for-kingcomposer/trunk/core/class-sidebar.php#L92
- https://www.wordfence.com/threat-intel/vulnerabilities/id/5145b6bf-a726-4ef8-964f-63504bf7107e?source=cve
Change history (0)
No recorded changes yet.