Code Injection Vulnerability in codelibs Fess JSP File Handler
CVE-2026-8211

5.1MEDIUM

Key Information:

Vendor

Codelibs

Status
Fess
Vendor
CVE Published:
9 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-8211?

A vulnerability in codelibs Fess versions up to 15.5.1 allows remote attackers to exploit the update function in the JSP File Handler component. Specifically, the flaw exists in the AdminDesignAction.java file, where manipulation of the content argument can lead to code injection, enabling unauthorized execution of scripts. Public exploitation details are available, and despite early disclosure attempts, the vendor has not provided a response.

Affected Version(s)

Fess 15.5.0

Fess 15.5.1

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-2026-8211 - Proof of Concept

References

https://vuldb.com/vuln/362419
vdb-entrytechnical-description
https://vuldb.com/vuln/362419/cti
signaturepermissions-required
https://vuldb.com/submit/804293
third-party-advisory

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
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

R1ckyZ (VulDB User)
VulDB CNA Team
.