What is CVE-2023-36655?

CVE-2023-36655 is a critical-severity vulnerability in Prolion Cryptospike, classified under Improper Authentication. CVSS score: 9.8/10. Published 2023-12-06.

How severe is CVE-2023-36655?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Prolion Cryptospike

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.

Vulnerability class: Broken Authentication

Published 2023-12-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (60.9th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 60.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Prolion Cryptospike — versions 3.0.15

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

prolion.com/cryptospike/ (Product)
www.cvcn.gov.it/cvcn/cve/CVE-2023-36655 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2023-36655?: CVE-2023-36655 is a critical-severity vulnerability in Prolion Cryptospike, classified under Improper Authentication. CVSS score: 9.8/10. Published 2023-12-06.
How severe is CVE-2023-36655?: Critical severity. CVSS v3 base score is 9.8 out of 10.