CVE-2023-23928
low-risk
Published 2023-02-01
reason-jose is a JOSE implementation in ReasonML and OCaml.`Jose.Jws.validate` does not check HS256 signatures. This allows tampering of JWS header and payload data if the service does not perform additional checks. Such tampering could expose applications using reason-jose to authorization bypass. Applications relying on JWS claims assertion to enforce security boundaries may be vulnerable to privilege escalation. This issue has been patched in version 0.8.2.
Do I need to act?
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0.17% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.9/10
Medium
NETWORK
/ HIGH complexity
Affected Products (1)
Reason-Jose
Affected Vendors
References (6)
Third Party Advisory
https://github.com/ulrikstrid/reason-jose/security/advisories/GHSA-7jj9-6qwv-wpm...
Third Party Advisory
https://github.com/ulrikstrid/reason-jose/security/advisories/GHSA-7jj9-6qwv-wpm...
24
/ 100
low-risk
Severity
18/34 · Moderate
Exploitability
1/34 · Minimal
Exposure
5/34 · Minimal