CVE-2021-48017: OrbiTeam BSCW Server 5.x before 5.2.5 and 7.x before 7.4.4 contains an unauthenticated path traversal vulnerab

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HIGH 7.5REMOTE

CVE-2021-48017 is a high-severity flaw (CVSS 7.5) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 64%)
CISA exploited list	No
Weakness	CWE-22
Published	2026-10-22
Last modified	2026-10-22

Publisher (CNA): VulnCheck

Last updated 2026-10-22 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Timeline

2026-10-22Published CVE record published
2026-10-22 17:40 UTCUpdated Record last modified

Exact fixes by distribution

Fedora 46 · retext · FIXED · 8.1.0-1.fc46 · FEDORA-2026-0602a84203 · source

sudo dnf upgrade --advisory=FEDORA-2026-0602a84203

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-48017?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Is CVE-2021-48017 being exploited?

CVE-2021-48017 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-48017 affect?

CVE-2021-48017 affects affected software. Severity is high (CVSS 7.5). 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 ../

How urgent is CVE-2021-48017?

Priority 40/100. High severity; Remotely exploitable, no login, no user action

References

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