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CVE-2023-45669

18
FAUCET Score

CVE-2023-45669 affects WebAuthn4J Spring Security, a library providing Web Authentication support for Spring applications. The vulnerability stems from improper handling of the signature counter value, preventing the detection of cloned authenticators. This medium-severity flaw (CVSS 5.3) allows an attacker to use a cloned authenticator without detection, impacting integrity (I:L) but not confidentiality or availability. There are no known exploits, Metasploit modules, or public discussions, and it is not on the CISA KEV catalog or Hot List. Users are advised to upgrade to version 0.9.1.RELEASE as no workarounds exist.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.9.1CPE matchmatch criteria
cpe:2.3:a:webauthn4j:spring_security:*:*:*:*:*:spring:*:*

CVSS Data

CVSS version used by this source: 3.1

4.8MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
2.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.52%
Probability of exploitation in next 30 days
EPSS Percentile
41.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0052 is in the 26th percentile among its peer group of 23,701 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 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

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
mavenpatch availablevia ghsa
Product: com.webauthn4j:webauthn4j-spring-security-coreFixed in: 0.9.1.RELEASE

Vendor Advisories (2)

mavenGHSA-v9hx-v6vf-g36jmedium

WebAuthn4J Spring Security Improper signature counter value handling

Oct 17, 2023
redhatCVE-2023-45669Moderate

webauthn4j: improper signature counter value handling

Oct 16, 2023

References

github.com / webauthn4j/webauthn4j-spring-security/commit/129700d74d83f9b9a82bf88ebc63707e3cb0a725
Patch
github.com / webauthn4j/webauthn4j-spring-security/security/advisories/GHSA-v9hx-v6vf-g36j
Vendor Advisory
w3.org / TR/2021/REC-webauthn-2-20210408
Technical Description