CVE-2021-41583

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-09-24 · updated 2026-06-17
Weakness: CWE-20

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.

Affected products

Eduvpn Vpn-User-Portal: from 2.3.2 before 2.3.14 — fixed in 2.3.14

How to fix

Upgrade to a fixed version: Eduvpn Vpn-User-Portal 2.3.14. Check the vendor advisory for mitigations.

References

https://list.surfnet.nl/pipermail/eduvpn-deploy/2021-September/000352.html
https://github.com/eduvpn/vpn-user-portal/releases
https://list.surfnet.nl/pipermail/eduvpn-deploy/2021-September/000352.html

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