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Vulnerability record · CVE-2022-24900 · published 29 April 2022

CVE-2022-24900: Piano led visualizer project piano led visualizer path traversal vulnerability

PPiano Led Visualizer Project · Piano Led Visualizer

Piano LED Visualizer is software that allows LED lights to light up as a person plays a piano connected to a computer. Version 1.3 and prior are vulnerable to a path traversal attack. The `os.path.join` call is unsafe for use with untrusted input. When the `os.path.join` call encounters an absolute path, it ignores all the parameters it has encountered till that point and starts working with the new absolute path. Since the "malicious" parameter represents an absolute path, the result of `os.path.join` ignores the static directory completely. Hence, untrusted input is passed via the `os.path.join` call to `flask.send_file` can lead to path traversal attacks. A patch with a fix is available on the `master` branch of the GitHub repository. This can also be fixed by preventing flow of untrusted data to the vulnerable `send_file` function. In case the application logic necessiates this behaviour, one can either use the `flask.safe_join` to join untrusted paths or replace `flask.send_file` calls with `flask.send_from_directory` calls.

8.6 CVSS 3.1 High EPSS 8.4% · top 5.2% CWE-22 · Path traversalCWE-73 · CWE-73
8.6CVSS 3.1 base score, v2 5.0
8.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
10References, 8 tagged exploit
17 Jun 2026Last modified by NVD

Description

Piano LED Visualizer is software that allows LED lights to light up as a person plays a piano connected to a computer. Version 1.3 and prior are vulnerable to a path traversal attack. The `os.path.join` call is unsafe for use with untrusted input. When the `os.path.join` call encounters an absolute path, it ignores all the parameters it has encountered till that point and starts working with the new absolute path. Since the "malicious" parameter represents an absolute path, the result of `os.path.join` ignores the static directory completely. Hence, untrusted input is passed via the `os.path.join` call to `flask.send_file` can lead to path traversal attacks. A patch with a fix is available on the `master` branch of the GitHub repository. This can also be fixed by preventing flow of untrusted data to the vulnerable `send_file` function. In case the application logic necessiates this behaviour, one can either use the `flask.safe_join` to join untrusted paths or replace `flask.send_file` calls with `flask.send_from_directory` calls.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/onlaj/Piano-LED-Visualizer/blob/6a732caa812c83a807c711f3d091af99209cae7b/webinterface/views_api.py#L9 ExploitThird Party Advisory
https://github.com/onlaj/Piano-LED-Visualizer/commit/3f10602323cd8184e1c69a76b815655597bf0ee5 PatchThird Party Advisory
https://github.com/onlaj/Piano-LED-Visualizer/issues/350 ExploitIssue TrackingPatchThird Party Advisory
https://github.com/onlaj/Piano-LED-Visualizer/pull/351 ExploitIssue TrackingPatchThird Party Advisory
https://github.com/onlaj/Piano-LED-Visualizer/security/advisories/GHSA-g78x-q3x8-r6m4 ExploitPatchThird Party Advisory
https://github.com/onlaj/Piano-LED-Visualizer/blob/6a732caa812c83a807c711f3d091af99209cae7b/webinterface/views_api.py#L9 ExploitThird Party Advisory
https://github.com/onlaj/Piano-LED-Visualizer/commit/3f10602323cd8184e1c69a76b815655597bf0ee5 PatchThird Party Advisory
https://github.com/onlaj/Piano-LED-Visualizer/issues/350 ExploitIssue TrackingPatchThird Party Advisory
https://github.com/onlaj/Piano-LED-Visualizer/pull/351 ExploitIssue TrackingPatchThird Party Advisory
https://github.com/onlaj/Piano-LED-Visualizer/security/advisories/GHSA-g78x-q3x8-r6m4 ExploitPatchThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2022-24900), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.