CVE-2020-22721

Name: CVE-2020-22721
Creator: NVD / NIST
Published: 2020-08-14T16:15:17.023+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.49%

Last modified Jun 17, 2026

CVE-2020-22721 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. A File Upload Vulnerability in PNotes - Andrey Gruber PNotes.NET v3.8.1.2 allows a local attacker to execute arbitrary code via the Miscellaneous " External Programs by uploading the malicious .exe file to the external program.. EPSS estimates a 0.49% chance of exploitation in the next 30 days.

Description

A File Upload Vulnerability in PNotes - Andrey Gruber PNotes.NET v3.8.1.2 allows a local attacker to execute arbitrary code via the Miscellaneous " External Programs by uploading the malicious .exe file to the external program.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

0.49%

38.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-434

Affected Software

Vendor	Product	Versions
Pnotes.Net Project	Pnotes.Net	3.8.1.2

References

https://syhack.wordpress.com/2020/04/18/pnotes-insecure-file-upload-vulnerability-code-execution/Exploit, Third Party Advisory
https://syhack.wordpress.com/2020/04/18/pnotes-insecure-file-upload-vulnerability-code-execution/Exploit, Third Party Advisory

Timeline

Published: Aug 14, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-22721?

How severe is CVE-2020-22721?

CVE-2020-22721 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.49% probability of exploitation in the next 30 days.

How do I fix CVE-2020-22721?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-22721?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST