In JetBrains Ktor before 2.3.5 default configuration of ContentNegotiation with XML format was vulnerable to XXE
https://github.com/clemfavre/cve-2023-45612_exploit
https://github.com/Jenderal92/PoC-AutoSync
https://github.com/password123456/cve-collector
https://www.jetbrains.com/privacy-security/issues-fixed/
Source: Mitre, NVD
Published: 2023-10-09
Updated: 2026-06-17
Base Score: 10
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C
Severity: Critical
Base Score: 9.8
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.00005