CVE-2023-40545

HIGHNVD 8.88.8—

8.8

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

CVSS v3: 8.8
EG Score: 8.8(medium)
EPSS: 30.2%
KEV: Not listed

Published

February 6, 2024

Last Modified

November 21, 2024

References (6)

responsible-disclosure@pingidentityhttps://docs.pingidentity.com/r/en-us/pingfederate-113/hro1701116403236
responsible-disclosure@pingidentityhttps://support.pingidentity.com/s/article/SECADV040-PingFederate-OAuth-Client-Authentication-Bypass
responsible-disclosure@pingidentityhttps://www.pingidentity.com/en/resources/downloads/pingfederate/previous-releases.html
af854a3a-2127-422b-91ae-364da2661108https://docs.pingidentity.com/r/en-us/pingfederate-113/hro1701116403236
af854a3a-2127-422b-91ae-364da2661108https://support.pingidentity.com/s/article/SECADV040-PingFederate-OAuth-Client-Authentication-Bypass
af854a3a-2127-422b-91ae-364da2661108https://www.pingidentity.com/en/resources/downloads/pingfederate/previous-releases.html

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-306Missing Authentication for Critical Function

Data Freshness Timeline

(refreshed 12× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-04 13:11 UTCepss_batch
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Frequently asked(5)

What is CVE-2023-40545?

CVE-2023-40545 is a high vulnerability published on February 6, 2024. Authentication bypass when an OAuth2 Client is using clientsecretjwt as its authentication method on affected 11.3 versions via specially crafted requests.

When was CVE-2023-40545 disclosed?

CVE-2023-40545 was first published in the National Vulnerability Database on February 6, 2024, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-40545 actively exploited?

CVE-2023-40545 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 30.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-40545?

CVE-2023-40545 has a CVSS v3 base score of 8.8 (NVD).

How do I remediate CVE-2023-40545?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-40545, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2023-40545

📅 Published

🔄 Last Modified

🔗 References (6)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-40545?

🔗 Related CVEs(same CWE)

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Published

Last Modified

References (6)

Frequently asked(5)

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