CVE-2021-33211Public exploitNetwork attack vector

Arbitrary file write via unchecked ZIP paths

Published Jul 14, 2021 · Updated Aug 3, 2024

Path traversal in Elements-IT HTTP Commander before 5.3.3.2020.11.16 allows remote authenticated users to write files outside the target folder. The Unpack ZIP feature preserves relative archive paths without validating that resolved destinations remain inside the selected extraction directory. Exploitation requires file-write and archive-unpacking rights, and writes are limited to locations writable by the web-server account.

CVSS severity6.5
Medium
EPSS probability1.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Elements-IT HTTP Commander before 5.3.3.2020.11.16 allows remote authenticated users to write files outside the target folder. The Unpack ZIP feature preserves relative archive paths without validating that resolved destinations remain inside the selected extraction directory. Exploitation requires file-write and archive-unpacking rights, and writes are limited to locations writable by the web-server account.

The record

CVE
CVE-2021-33211
Published
Jul 14, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-22, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 14, 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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
4.0NIST National Vulnerability DatabaseAV:N/AC:L/Au:S/C:N/I:P/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1190Exploit Public-Facing Application

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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