THREATPORT/VULNERABILITY/CVE-2021-39271
HIGH SEVERITY

CVE-2021-39271

Bscw Classic vulnerability

CVSS
8.8
EPSS
3.7%
EPSS pct
89th
Exploited
No known
OrbiTeam BSCW Classic before 7.4.3 allows authenticated remote code execution (RCE) during archive extraction via attacker-supplied Python code in the class attribute of a .bscw file. This is fixed in 5.0.12, 5.1.10, 5.2.4, 7.3.3, and 7.4.3.
Affected vendor
Bscw
Affected product
Bscw Classic
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
2021-08-30

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring low privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 3.7% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 89% of all scored CVEs.

Check your external exposure to CVE-2021-39271

  • Confirm whether Bscw Bscw Classic is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2021-39271.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-39271

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2021-39271 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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