What is CVE-2023-45613?

CVE-2023-45613 is a medium-severity vulnerability in Jetbrains Ktor, classified under Improper Certificate Validation. CVSS score: 6.8/10. Published 2023-10-09.

How severe is CVE-2023-45613?

Medium severity. CVSS v3 base score is 6.8 out of 10.

Is CVE-2023-45613 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Jetbrains Ktor

CVE-2023-45613

In JetBrains Ktor before 2.3.5 server certificates were not verified

Vulnerability class: Improper Certificate Validation

Published 2023-10-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.003 (26.7th percentile), scored 2026-10-20.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 26.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000

Affected products

Jetbrains Ktor — versions 0

Weakness classification (CWE)

CWE-295 — Improper Certificate Validation

Public proof-of-concept exploits

password123456/cve-collector

References

www.jetbrains.com/privacy-security/issues-fixed/ (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2023-45613?: CVE-2023-45613 is a medium-severity vulnerability in Jetbrains Ktor, classified under Improper Certificate Validation. CVSS score: 6.8/10. Published 2023-10-09.
How severe is CVE-2023-45613?: Medium severity. CVSS v3 base score is 6.8 out of 10.
Is CVE-2023-45613 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.