Unauthenticated Path Traversal Vulnerability in OrbiTeam BSCW Server
CVE-2021-48017

8.7HIGH

Key Information:

Vendor

Orbiteam

Status
Bscw Server
Vendor
CVE Published:
22 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2021-48017?

The OrbiTeam BSCW Server, specifically versions prior to 5.2.5 and 7.4.4, is susceptible to an unauthenticated path traversal vulnerability. This flaw enables attackers to exploit the 'style_name' parameter in theme operations via GET requests to the /pub/bscw.cgi/?op=theme endpoint. By utilizing '../' sequences, an attacker can read sensitive files from the server, such as /etc/passwd. This vulnerability was first identified in an exploit observed by the Shadowserver Foundation on October 22, 2023, highlighting the potential risk of unauthorized file access.

Affected Version(s)

BSCW Server 5.0.0 < 5.2.5

BSCW Server 7.0.0 < 7.4.4

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-2021-48017 - Proof of Concept

CVE-2021-48017 - Proof of Concept

References

https://web.archive.org/web/20260421125237/https://sec-co...
third-party-advisoryexploit
https://packetstorm.news/files/id/165156/
exploit
https://github.com/projectdiscovery/nuclei-templates/blob...
technical-description

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Armin Stock (Atos ODS) of SEC Consult Vulnerability Lab
The Shadowserver Foundation
.