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TI-2023-24414 Aliases CVE-2023-45613GHSA-2fvw-ppfc-cm77

In JetBrains Ktor before 2.3.5 server certificates were not verified

Priority MEDIUM 41CWE-295Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Spoofing
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-295.

Summary

In JetBrains Ktor before 2.3.5 server certificates were not verified

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00381 32nd percentileScored 2026-11-07
Fix Fixed Ktor (JetBrains): 2.3.5

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
JetBrainsKtorbefore 2.3.52.3.5Patch availableCNA
  • Ktor VendorJetBrains Affected before 2.3.5 Fixed in 2.3.5 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:jetbrains:ktor:*:*:*:*:*:*:*:*before 2.3.5VulnerableJetBrains
  • cpe:2.3:a:jetbrains:ktor:*:*:*:*:*:*:*:* Versions before 2.3.5 Vulnerable ·JetBrains

Remediation

  • Fix · CNA Ktor (JetBrains) Fixed in 2.3.5

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    JetBrains Ktor 2.3.5

    2 records Highest priority Priority MEDIUM 2 MEDIUM

    Other records, highest priority first

    • TI-2023-24413 In JetBrains Ktor before 2.3.5 default configuration of ContentNegotiation with XML format was vulnerable to XXEPriority MEDIUM 49
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-45613
  2. 2026-10-03 Alias added: GHSA-2fvw-ppfc-cm77

References

Patch 1

  • TI-2023-24413 In JetBrains Ktor before 2.3.5 default configuration of ContentNegotiation with XML format was vulnerable to XXE CVSS 3.1CRITICAL 9.8
  • TI-2019-09527 JetBrains Ktor framework before 1.2.0-rc does not sanitize the username provided by the… CVSS 3.1CRITICAL 9.8
  • TI-2022-24056 In JetBrains Ktor before 2.3.0 path traversal in the `resolveResource` method was possible CVSS 3.1HIGH 7.5
  • TI-2022-12277 SHA1 implementation in JetBrains Ktor Native 2.0.0 was returning the same value. CVSS 3.1HIGH 8.7
  • TI-2019-07426 JetBrains Ktor framework (created using the Kotlin IDE template) versions before 1.1.0… CVSS 3.0HIGH 8.1
  • TI-2021-19215 In JetBrains Ktor before 1.6.4, nonce verification during the OAuth2 authentication process is implemented improperly. CVSS 3.1HIGH 7.5
See all 20 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences