Cross Site Scripting Vulnerability in atjiu pybbs 6.0.0
CVE-2026-4494

5.1MEDIUM

Key Information:

Vendor

Atjiu

Status
Pybbs
Vendor
CVE Published:
20 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-4494?

A cross site scripting vulnerability was discovered in atjiu pybbs version 6.0.0, specifically within the create function of the TopicApiController.java file. This flaw allows remote attackers to execute arbitrary JavaScript in the context of users' browsers, leading to potential data theft or session hijacking. Given that the exploit is publicly available, it poses a significant risk to users of the affected product.

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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-2026-4494 - Proof of Concept

References

https://vuldb.com/?id.352020
vdb-entrytechnical-description
https://vuldb.com/?ctiid.352020
signaturepermissions-required
https://vuldb.com/?submit.773779
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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