Cookie Validation Vulnerability in liufee FeehiCMS by liufee
CVE-2026-86241

5.3MEDIUM

Key Information:

Vendor

Liufee

Status
Feehicms
Vendor
CVE Published:
7 September 2026

Badges

๐Ÿ‘พ Exploit Exists๐ŸŸก Public PoC

What is CVE-2026-86241?

A vulnerability has been discovered in liufee FeehiCMS versions up to 2.1.1 that affects the cookie validation component within the main-local.php configuration file. The flaw arises from the unsecure handling of the cookieValidationKey, which utilizes a hard-coded cryptographic key. This can be exploited remotely, potentially allowing attackers to manipulate cookie details and execute unauthorized actions. Although the issue was reported to the developers, no response has been provided as of yet, leaving users at risk. It is crucial for users to remain vigilant and apply remedial measures to protect their installations.

Affected Version(s)

FeehiCMS 2.1.0

FeehiCMS 2.1.1

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-2026-86241 - Proof of Concept

References

https://vuldb.com/vuln/399398
vdb-entrytechnical-description
https://vuldb.com/vuln/399398/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-86241
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • ๐ŸŸก

    Public PoC available

  • ๐Ÿ‘พ

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

lyang (VulDB User)
VulDB CNA Team
.