Improper Authorization in kalcaddle kodbox Affected by msgWarning Plugin
CVE-2026-18720

6.9MEDIUM

Key Information:

Vendor

Kalcaddle

Status
Kodbox
Vendor
CVE Published:
4 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-18720?

A vulnerability has been identified in kalcaddle kodbox version 1.67 Build 02, specifically within the msgWarning Plugin located at /index.php?plugin/msgWarning/action. This flaw permits unauthorized actions due to insufficient access control checks. The manipulation can be executed remotely, which raises significant security concerns. Despite attempts to notify the vendor regarding this issue, no response has been received, and the exploit has already been made public.

Affected Version(s)

kodbox 1.67 Build 02

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-18720 - Proof of Concept

References

https://vuldb.com/vuln/385631
vdb-entry
https://vuldb.com/vuln/385631/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-18720
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

lihongming (VulDB User)
VulDB CNA Team
.