How severe is CVE-2020-22721?

CVE-2020-22721 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-22721 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-22721?

CVE-2020-22721 affects Pnotes.net Project Pnotes.net. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-22721?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-22721 published?

CVE-2020-22721 was published on 2020-08-14 and last updated on 2026-06-17.

CVE-2020-22721

CVE-2020-22721 is a high-severity vulnerability in Pnotes.net Project Pnotes.net with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-434.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 4.6
EPSS exploit prediction: 0% (39th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Pnotes.net Project Pnotes.net
Published: 2020-08-14
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2020-22721?: 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.
How severe is CVE-2020-22721?: CVE-2020-22721 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-22721 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-22721?: CVE-2020-22721 affects Pnotes.net Project Pnotes.net. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-22721?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-22721 published?: CVE-2020-22721 was published on 2020-08-14 and last updated on 2026-06-17.

References

https://syhack.wordpress.com/2020/04/18/pnotes-insecure-file-upload-vulnerability-code-execution/

Affected products (1)

cpe:2.3:a:pnotes.net_project:pnotes.net:3.8.1.2:*:*:*:*:*:*:*

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