CVE-2023-37260Network attack vector

Private-key disclosure via exception message

Published Jul 6, 2023 · Updated Nov 6, 2024

Sensitive-data exposure in OAuth2 Server 8.3.2 through 8.4.1 and 8.5.0 through 8.5.2 allows attackers to read a private key in an exception. CryptKey treats a string-supplied key as a file path when key loading fails and appends that value to a LogicException message. Exposure requires an application to pass key contents as a string, supply an invalid required passphrase, and reveal the resulting exception.

CVSS severity8.2
High
EPSS probability0.95%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Sensitive-data exposure in OAuth2 Server 8.3.2 through 8.4.1 and 8.5.0 through 8.5.2 allows attackers to read a private key in an exception. CryptKey treats a string-supplied key as a file path when key loading fails and appends that value to a LogicException message. Exposure requires an application to pass key contents as a string, supply an invalid required passphrase, and reveal the resulting exception.

The record

CVE
CVE-2023-37260
Published
Jul 6, 2023
Updated
Nov 6, 2024
Vendor
OAuth.js
Product
OAuth2 Server
Classifications
CWE-209, T1552.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 6, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 6, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=8.3.2 <8.5.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OAuth.js · OAuth2 Serverversion=8.3.2 <8.5.3
The PHP League · OAuth2 Serverversion=>= 8.3.2, < 8.5.3

Published CVSS scores

8.2GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-209Generation of Error Message Containing Sensitive Information
T1552.004Unsecured Credentials: Private Keys

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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