Cross-Site Scripting Vulnerability in atjiu pybbs
CVE-2025-8550

4.8MEDIUM

Key Information:

Vendor

Atjiu

Status
Pybbs
Vendor
CVE Published:
5 August 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-8550?

A cross-site scripting (XSS) vulnerability exists in atjiu pybbs versions up to 6.0.0. This issue arises from an improper validation of user input within the /admin/topic/list file, specifically the Username parameter. An attacker could exploit this vulnerability remotely, leading to potential unauthorized access or manipulation of platform data. The vendor has acknowledged the issue, and a patch (commit 2fe4a51afbce0068c291bc1818bbc8f7f3b01a22) is available to mitigate this risk. Users are strongly advised to apply the patch promptly to protect against potential exploitation.

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Deploy the Patch

Affected Version(s)

pybbs 6.0

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-2025-8550 - Proof of Concept

CVE-2025-8550
Created by byteReaper77

References

https://vuldb.com/?id.318679
vdb-entrytechnical-description
https://vuldb.com/?ctiid.318679
signaturepermissions-required
https://vuldb.com/?submit.622194
third-party-advisory

CVSS V4

Score:
4.8
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)
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