Cross-Site Scripting Vulnerability in FastBee by kerwincui
CVE-2026-7677

5.1MEDIUM

Key Information:

Vendor

Kerwincui

Status
Fastbee
Vendor
CVE Published:
3 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-7677?

A cross-site scripting (XSS) vulnerability exists in the FastBee application from kerwincui affecting versions up to 1.2.1. The issue is found in the System Notice Handler, specifically in the 'Add' function of SysNoticeController.java. An attacker can manipulate the 'noticeContent' argument, enabling remote exploitation of this vulnerability. This weakness allows an attacker to execute arbitrary scripts in the context of a user's session, potentially compromising user data and application integrity. Despite early notification to the vendor regarding this security issue, there has been no response.

Affected Version(s)

FastBee 1.2.0

FastBee 1.2.1

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-2026-7677 - Proof of Concept

References

https://vuldb.com/vuln/360830
vdb-entrytechnical-description
https://vuldb.com/vuln/360830/cti
signaturepermissions-required
https://vuldb.com/submit/800724
third-party-advisory

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

xcxr (VulDB User)
VulDB CNA Team
.