CVE-2023-1837Network attack vector

Authentication bypass via unauthenticated Legacy APIs

Published May 23, 2023 · Updated Jan 17, 2025

Missing authentication in HYPR Server before 8.0 allows remote authenticated users to bypass authentication through enabled Legacy APIs. The published record identifies only Legacy APIs, which omit authentication for a critical function; HYPR has not named the endpoint or protected operation. Reachability requires Legacy APIs to be enabled and low-privileged access, and the exact data or server action exposed remains undisclosed.

CVSS severity8.5
High
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in HYPR Server before 8.0 allows remote authenticated users to bypass authentication through enabled Legacy APIs. The published record identifies only Legacy APIs, which omit authentication for a critical function; HYPR has not named the endpoint or protected operation. Reachability requires Legacy APIs to be enabled and low-privileged access, and the exact data or server action exposed remains undisclosed.

The record

CVE
CVE-2023-1837
Published
May 23, 2023
Updated
Jan 17, 2025
Vendor
HYPR
Product
HYPR Server
Classifications
CWE-306, CAPEC-115, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 23, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 17, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <8.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

HYPR · HYPR Serverversion=0 <8.0

Published CVSS scores

8.5HYPR CorpCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
CAPEC-115Authentication Bypass
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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