UpHeron
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Servers and applications

CVE-2022-0547

OpenVPN 2.1 until v2.4.12 and v2.5.6 may enable authentication bypass in external authentication plug-ins when more than one of them makes use of deferred authentication replies, which allows an external user to be granted access with only partially correct credentials.

Severity
Critical 9.8
Published
18 Mar 2022
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
2.4.12, 2.5.6
Sources
NVD

Affected software

SoftwareAffected versions
OpenVPNServers and applications · cpe:a:openvpn:openvpn
  • From 2.1.0 before 2.4.12
  • From 2.5.0 before 2.5.6

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2022-0547
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2022-0547