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CVE-2021-41583

22
FAUCET Score

CVE-2021-41583 affects vpn-user-portal (eduVPN/Let's Connect!) versions prior to 2.3.14, specifically as packaged for Debian 10, Debian 11, and Fedora. This vulnerability allows remote authenticated users to gain OS filesystem access due to an interaction between QR codes and an 'exec' command using the '-r' option, which can then be used to obtain further VPN access. Rated as Medium severity with a CVSS score of 6.5, the attack vector is network-based with low complexity, requiring low privileges and no user interaction. The primary impact is high confidentiality, as attackers can read sensitive data from the filesystem. Currently, there is no evidence of active exploitation, nor are there any publicly available exploit modules or proof-of-concept code in Metasploit, Nuclei, or ExploitDB. The vulnerability has received minimal community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.3.2, < 2.3.14CPE matchmatch criteria
cpe:2.3:a:eduvpn:vpn-user-portal:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.88%
Probability of exploitation in next 30 days
EPSS Percentile
77.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0188 is in the 90th percentile among its peer group of 21,951 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

list.surfnet.nl / pipermail/eduvpn-deploy/2021-September/000352.html
Mailing ListThird Party Advisory
github.com / eduvpn/vpn-user-portal/releases
Release NotesThird Party Advisory