CVE-2021-33359Public exploitNetwork attack vector

Unauthenticated host-file read via unrestricted screenshot URLs

Published Jun 9, 2021 · Updated Aug 3, 2024

Arbitrary file read in SensePost gowitness before 2.3.6 allows remote attackers to read host files through its screenshot servers. The server and report submission handlers passed URLs of any scheme to headless Chrome, so file:// rendered local content into an HTTP response or stored screenshot. Exploitation requires a server reachable beyond its default localhost binding; the consequence is read-only disclosure of files accessible to the process.

CVSS severity7.5
High
EPSS probability1.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Arbitrary file read in SensePost gowitness before 2.3.6 allows remote attackers to read host files through its screenshot servers. The server and report submission handlers passed URLs of any scheme to headless Chrome, so file:// rendered local content into an HTTP response or stored screenshot. Exploitation requires a server reachable beyond its default localhost binding; the consequence is read-only disclosure of files accessible to the process.

The record

CVE
CVE-2021-33359
Published
Jun 9, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-552, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 9, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-552Files or Directories Accessible to External Parties
T1005Data from Local System

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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