CVE-2021-41583

Name: CVE-2021-41583
Creator: NVD / NIST
Published: 2021-09-24T03:15:06.62+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.82%

Last modified Jun 17, 2026

CVE-2021-41583 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. vpn-user-portal (aka eduVPN or Let's Connect!) before 2.3.14, as packaged for Debian 10, Debian 11, and Fedora, allows remote authenticated users to obtain OS filesystem access, because of the interaction of QR codes with an exec that uses the -r option. This can be leveraged to obtain additional VPN access.. EPSS estimates a 1.82% chance of exploitation in the next 30 days.

Description

vpn-user-portal (aka eduVPN or Let's Connect!) before 2.3.14, as packaged for Debian 10, Debian 11, and Fedora, allows remote authenticated users to obtain OS filesystem access, because of the interaction of QR codes with an exec that uses the -r option. This can be leveraged to obtain additional VPN access.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

1.82%

75.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Eduvpn	Vpn-User-Portal	>= 2.3.2, < 2.3.14

References

https://list.surfnet.nl/pipermail/eduvpn-deploy/2021-September/000352.htmlMailing List, Third Party Advisory
https://github.com/eduvpn/vpn-user-portal/releasesRelease Notes, Third Party Advisory
https://list.surfnet.nl/pipermail/eduvpn-deploy/2021-September/000352.htmlMailing List, Third Party Advisory

Timeline

Published: Sep 24, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-41583?

How severe is CVE-2021-41583?

CVE-2021-41583 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.82% probability of exploitation in the next 30 days.

How do I fix CVE-2021-41583?

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-2021-41583?

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

Scan your code now

Source: NVD / NIST