Cross Site Scripting Vulnerability in atjiu pybbs 6.0.0
CVE-2026-4495

5.1MEDIUM

Key Information:

Vendor

Atjiu

Status
Pybbs
Vendor
CVE Published:
20 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-4495?

A security flaw exists in atjiu pybbs version 6.0.0, specifically within the create function of the CommentApiController.java file. This vulnerability allows for cross site scripting attacks, enabling malicious users to execute harmful scripts in the context of another user. The issue is serious as it can be exploited remotely, risking user data and application integrity. The exploit details have been made publicly available, heightening the urgency for affected users to secure their systems against potential attacks.

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Affected Version(s)

pybbs 6.0.0

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-2026-4495 - Proof of Concept

References

https://vuldb.com/?id.352021
vdb-entrytechnical-description
https://vuldb.com/?ctiid.352021
signaturepermissions-required
https://vuldb.com/?submit.773780
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)
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