CVE-2023-36655Network attack vector

Authentication bypass via case-variant blocked username

Published Dec 6, 2023 · Updated Oct 10, 2024

Improper authentication in ProLion CryptoSpike 3.0.15P2 allows remote attackers to obtain an authentication token via the login REST API. The login API treats username casing inconsistently between blocked-user enforcement and directory authentication, accepting a case-variant form of the same account. An attacker needs credentials for a blocked LDAP or Active Directory account; changing only the username letter case bypasses the block and creates a usable token.

CVSS severity9.8
Critical
EPSS probability0.98%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in ProLion CryptoSpike 3.0.15P2 allows remote attackers to obtain an authentication token via the login REST API. The login API treats username casing inconsistently between blocked-user enforcement and directory authentication, accepting a case-variant form of the same account. An attacker needs credentials for a blocked LDAP or Active Directory account; changing only the username letter case bypasses the block and creates a usable token.

The record

CVE
CVE-2023-36655
Published
Dec 6, 2023
Updated
Oct 10, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-287, T1078
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 6, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 10, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/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.

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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-287Improper Authentication
T1078Valid Accounts

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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