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

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Summary

CVECVE-2026-12349
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-30 06:16:26 UTC
Updated2026-06-30 14:08:13 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

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

EPSS: 0.002390000 probability, percentile 0.149060000 (date 2026-06-30)

Problem Types: CWE-862 | CWE-862 CWE-862 Missing Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
3.1CNADECLARED5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Octagonwebstudio Premium Addons For KingComposer affected 1.1.1 semver Not specified

References

ReferenceSourceLinkTags
www.wordfence.com/threat-intel/vulnerabilities/id/5145b6bf-a726-4ef8-964f-63504... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/premium-addons-for-kingcomposer/trunk/core/class-side... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/premium-addons-for-kingcomposer/trunk/core/class-side... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/premium-addons-for-kingcomposer/trunk/core/class-side... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/premium-addons-for-kingcomposer/trunk/core/class-side... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/premium-addons-for-kingcomposer/trunk/core/class-side... [email protected] plugins.trac.wordpress.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Eason (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-06-29T16:17:38.000ZDisclosed
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