WordPress plugin

KBoard <= 6.6 — Unauthenticated Insecure Direct Object Reference

CVE-2026-88910Published Sep 14, 2026 · Updated Nov 13, 2026

Affected: ≤6.6Update to 6.7 or newer

All remediation steps

Watch plugin

Severity

Medium5.3

CVSS

5.3

CVSS 3.1 · CNA (Wordfence)

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

What does this vector mean?

AV:N Attack vector: Network
AC:L Attack complexity: Low
PR:N Privileges required: None
UI:N User interaction: None
S:U Scope: Unchanged
C:N Confidentiality: None
I:L Integrity: Low
A:N Availability: None

Weakness

CWE-639 Authorization Bypass Through User-Controlled Key

Required access

No account needed

Exploit prediction (EPSS)

No score

CISA KEV

Not listed

On this page7

Am I affected?

kboard kboard

Affected≤ 6.6
Patched in6.7

You are affected if you run ≤ 6.6. Version 6.7 and later are not affected by this issue.

Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under kboard.
No admin access? Run a passive check of your site. It reads public files only.
No account is needed to exploit this. Treat any exposed site on an affected version as at risk.

What to do

Update to version 6.7, or a newer patched version
Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
Watch kboard to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to seongjun joo.

The KBoard plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 6.6. This is due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to perform an unauthorized action.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

Advisorywordfence.com

Timeline

Sep 14, 2026
CVE published
Severity medium, CVSS 5.3
Nov 13, 2026
Record last updated

Sources & licenses

Wordfence record

Vulnerability data: Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
CVE® identifiers: [object Object]. 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.

How we use these sources