CVE-2021-41185Public exploitNetwork attack vector

Arbitrary file disclosure via unchecked attachment paths

Published Oct 26, 2021 · Updated Aug 4, 2024

Path traversal in Kizniche Mycodo before 8.12.7 allows remote authenticated users to read files outside the note-attachment directory. The send_note_attachment route passes a path formed by joining its filename parameter to PATH_NOTE_ATTACHMENTS directly to Flask's send_file without confirming that the resolved path remains inside that directory. A Mycodo account or enabled guest access must reach the endpoint; successful traversal discloses any file readable by the web service.

CVSS severity8.8
High
EPSS probability1.42%
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 Kizniche Mycodo before 8.12.7 allows remote authenticated users to read files outside the note-attachment directory. The send_note_attachment route passes a path formed by joining its filename parameter to PATH_NOTE_ATTACHMENTS directly to Flask's send_file without confirming that the resolved path remains inside that directory. A Mycodo account or enabled guest access must reach the endpoint; successful traversal discloses any file readable by the web service.

The record

CVE
CVE-2021-41185
Published
Oct 26, 2021
Updated
Aug 4, 2024
Vendor
Kizniche
Product
Mycodo
Classifications
CWE-22, T1005
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 26, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 8.12.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

Kizniche · Mycodoversion=< 8.12.7

Published CVSS scores

8.8GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
4.0NIST NVDAV:N/AC:L/Au:S/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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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