THREATPORT/VULNERABILITY/CVE-2021-33558
HIGH SEVERITY

CVE-2021-33558

Boa vulnerability

CVSS
7.5
EPSS
12.3%
EPSS pct
96th
Exploited
No known
Boa 0.94.13 allows remote attackers to obtain sensitive information via a misconfiguration involving backup.html, preview.html, js/log.js, log.html, email.html, online-users.html, and config.js. NOTE: multiple third parties report that this is a site-specific issue because those files are not part of Boa.
Affected vendor
Boa
Affected product
Boa
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
2021-05-27

Risk analysis

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

Its EPSS score of 12.3% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 96% of all scored CVEs.

Check your external exposure to CVE-2021-33558

  • Confirm whether Boa Boa is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2021-33558.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-33558

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2021-33558 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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