In certain IETF OAuth 2.0-related specifications, when the JSON Web Token Profile for OAuth 2.0 Client Authentication mechanism is used, there are ambiguities in the audience values of JWTs sent to authorization servers. The affected RFCs may include RFC 7523, and also RFC 7521, RFC 7522, RFC 9101 (JAR), and RFC 9126 (PAR).
CVE-2025-27371
Score 6.9 from GitHub Security Advisory published 2025-03-03. NVD baseline CVSS 6.9; sources differ by 0.0.
- Lower severity and no public exploit yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 6.9
- EG Score
- 6.9(medium)
- EG Risk
- 31(Track)EG Risk 31/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity69% × 45%Exploitation0% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 24%
- KEV
- Not listed
Published
March 3, 2025
Last Modified
April 15, 2026
References (5)
- cve@mitrehttps://eprint.iacr.org/2025/629
- cve@mitrehttps://github.com/OWASP/ASVS/issues/2678
- cve@mitrehttps://openid.net/notice-of-a-security-vulnerability/
- cve@mitrehttps://openid.net/wp-content/uploads/2025/01/OIDF-Responsible-Disclosure-Notice-on-Security-Vulnerability-for-private_key_jwt.pdf
- cve@mitrehttps://talks.secworkshop.events/osw2025/talk/R8D9BS/
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 10× in last 7d / 45× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
Showing the most recent 100 of 129 total refreshes for this CVE.
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Frequently asked(5)
What is CVE-2025-27371?
When was CVE-2025-27371 disclosed?
Is CVE-2025-27371 actively exploited?
What is the CVSS score of CVE-2025-27371?
How do I remediate CVE-2025-27371?
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2025-27371
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