How severe is CVE-2023-36655?

CVE-2023-36655 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-36655 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-36655?

CVE-2023-36655 affects Prolion Cryptospike. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-36655?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2023-36655 published?

CVE-2023-36655 was published on 2023-12-06 and last updated on 2026-06-17.

CVE-2023-36655

CVE-2023-36655 is a critical-severity vulnerability in Prolion Cryptospike with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (58th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Prolion Cryptospike
Published: 2023-12-06
Last modified: 2026-06-17

Description

The login REST API in ProLion CryptoSpike 3.0.15P2 (when LDAP or Active Directory is used as the users store) allows a remote blocked user to login and obtain an authentication token by specifying a username with different uppercase/lowercase character combination.

Frequently asked questions

What is CVE-2023-36655?: The login REST API in ProLion CryptoSpike 3.0.15P2 (when LDAP or Active Directory is used as the users store) allows a remote blocked user to login and obtain an authentication token by specifying a username with different uppercase/lowercase character combination.
How severe is CVE-2023-36655?: CVE-2023-36655 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-36655 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-36655?: CVE-2023-36655 affects Prolion Cryptospike. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-36655?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-36655 published?: CVE-2023-36655 was published on 2023-12-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:prolion:cryptospike:3.0.15:p2:*:*:*:*:*:*

More vulnerabilities in Prolion Cryptospike

CVE-2023-36649 — Critical (CVSS 9.1): Insertion of sensitive information in the centralized (Grafana) logging system in ProLion CryptoSpike 3.0.15P2 allows…
CVE-2023-36646 — High (CVSS 8.8): Incorrect user role checking in multiple REST API endpoints in ProLion CryptoSpike 3.0.15P2 allows a remote attacker…
CVE-2023-36648 — High (CVSS 8.2): Missing authentication in the internal data streaming system in ProLion CryptoSpike 3.0.15P2 allows remote…
CVE-2023-36647 — High (CVSS 7.5): A hard-coded cryptographic private key used to sign JWT authentication tokens in ProLion CryptoSpike 3.0.15P2 allows…
CVE-2023-36651 — High (CVSS 7.2): Hidden and hard-coded credentials in ProLion CryptoSpike 3.0.15P2 allow remote attackers to login to web management as…
CVE-2023-36650 — High (CVSS 7.2): A missing integrity check in the update system in ProLion CryptoSpike 3.0.15P2 allows attackers to execute OS commands…

All CVEs affecting Prolion Cryptospike →

Other CWE-287 (Improper Authentication) vulnerabilities

CVE-2026-45480 — Critical (CVSS 10.0): Improper authentication in Azure Active Directory allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-46389 — Critical (CVSS 10.0): UDS Identity Config builds the Keycloak configuration image (realm, plugins, theme, truststore, JARs) consumed by UDS…
CVE-2026-10611 — Critical (CVSS 10.0): An authentication bypass vulnerability exists in MISP when LDAP mixed authentication is enabled with OTP enforcement.…
CVE-2026-47280 — Critical (CVSS 10.0): Improper authentication in Azure Resource Manager (ARM) allows an unauthorized attacker to elevate privileges over a…
CVE-2026-42822 — Critical (CVSS 10.0): Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges…
CVE-2026-20182 — Critical (CVSS 10.0): May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and…

Browse all CWE-287 (Improper Authentication) vulnerabilities →