$ cve CVE-2022-24900 JSON

CVE-2022-24900

9.9

CRITICAL · CVSS 3.1 · EPSS 8.4% (pctl 95)

In your normal cycle

Critical by CVSS (9.9), but no sign of active exploitation.

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.

Scoring

CVSS	9.9 (CRITICAL, v3.1)
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:L
EPSS	8.41% — more likely to be exploited than 95% of all CVEs
Weakness	CWE-22
On CISA KEV	no
Public exploit	none known
Published	2022-04-29
Last modified	2026-06-17

Affected (1)

Vendor	Product
piano led visualizer project	piano led visualizer

References

→ the Explorer · watch your stack · NVD