Vulnerability Report

CVE-2020-10185

Title: Yubico Yubikey One Time Password Validation Server

Other

Proof Of Concept

No public PoC currently indexed for CVE-2020-10185.

CWE Category CWE-294
Published Date Mar 05, 2020
Modified Date Jun 17, 2026
Exploit Status Not Found
Score 8.6 CVSS v3.1
Exploit Probability (EPSS)
1.45%

Vulnerability Summary

CVE-2020-10185: The sync endpoint in YubiKey Validation Server before 2.40 allows remote attackers to replay an OTP. NOTE: this issue is potentially relevant to persons outside Yubico who operate a self-hosted OTP validation service with a non-default configuration such as an open sync pool; the issue does NOT affect YubiCloud.

Impacted Vendors

Y
yubico 1

Reference Links

https://github.com/Yubico/yubikey-val/releases/tag/yubikey-val-2.40 https://lists.debian.org/debian-lts-announce/2020/03/msg00014.html https://www.yubico.com/support/security-advisories/ysa-2020-01/ https://github.com/Yubico/yubikey-val/releases/tag/yubikey-val-2.40 https://lists.debian.org/debian-lts-announce/2020/03/msg00014.html https://www.yubico.com/support/security-advisories/ysa-2020-01/
CVSS v3.1
Source Entity [email protected]
Severity HIGH
8.6
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
CVSS v2.0
Source Entity [email protected]
Severity MEDIUM
6.8
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:N/AC:M/Au:N/C:P/I:P/A:P

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2020-10185 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

Affected Stack

No specific products linked.