CVE-2023-40545

Name: CVE-2023-40545
Creator: NVD / NIST
Published: 2024-02-06T18:15:58.47+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.93%

Last modified Jun 17, 2026

CVE-2023-40545 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Authentication bypass when an OAuth2 Client is using client_secret_jwt as its authentication method on affected 11.3 versions via specially crafted requests. . EPSS estimates a 0.93% chance of exploitation in the next 30 days.

Description

Authentication bypass when an OAuth2 Client is using client_secret_jwt as its authentication method on affected 11.3 versions via specially crafted requests.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

0.93%

56.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Pingidentity	Pingfederate	11.3.0

References

https://docs.pingidentity.com/r/en-us/pingfederate-113/hro1701116403236Release Notes
https://support.pingidentity.com/s/article/SECADV040-PingFederate-OAuth-Client-Authentication-BypassPermissions Required
https://www.pingidentity.com/en/resources/downloads/pingfederate/previous-releases.htmlRelease Notes
https://docs.pingidentity.com/r/en-us/pingfederate-113/hro1701116403236Release Notes
https://support.pingidentity.com/s/article/SECADV040-PingFederate-OAuth-Client-Authentication-BypassPermissions Required
https://www.pingidentity.com/en/resources/downloads/pingfederate/previous-releases.htmlRelease Notes

Timeline

Published: Feb 6, 2024
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-40545?

Authentication bypass when an OAuth2 Client is using client_secret_jwt as its authentication method on affected 11.3 versions via specially crafted requests.

How severe is CVE-2023-40545?

CVE-2023-40545 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.93% probability of exploitation in the next 30 days.

How do I fix CVE-2023-40545?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-40545?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST