Cross-Site Scripting Vulnerability in Gnuboard g6 by Gnuboard
CVE-2025-7786

5.1MEDIUM

Key Information:

Vendor

Gnuboard

Status
G6
Vendor
CVE Published:
18 July 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-7786?

A vulnerability has been identified in Gnuboard g6 versions up to 6.0.10, particularly affecting the Post Reply Handler component. This issue allows attackers to exploit the file '/bbs/scrap_popin_update/qa/' to execute malicious scripts in the context of the user's browser. Such cross-site scripting attacks can result in unauthorized access to sensitive user data and system manipulation. The exploit method is publicly available, increasing the risk for users who have not updated their systems.

Affected Version(s)

g6 6.0.0

g6 6.0.1

g6 6.0.2

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-2025-7786 - Proof of Concept

References

https://vuldb.com/?id.316847
vdb-entry
https://vuldb.com/?ctiid.316847
signaturepermissions-required
https://vuldb.com/?submit.615735
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

ZAST.AI (VulDB User)
.
CVE-2025-7786 : Cross-Site Scripting Vulnerability in Gnuboard g6 by Gnuboard