CVE-2023-45612
In JetBrains Ktor before 2.3.5 default configuration of ContentNegotiation with XML format was...
In JetBrains Ktor before 2.3.5 default configuration of ContentNegotiation with XML format was vulnerable to XXE
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
In JetBrains Ktor before 2.3.5 default configuration of ContentNegotiation with XML format was vulnerable to XXE
- Record
CVE-2023-45612- CVSS 3.1
- 8.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N - Weakness
- CWE-611
- Updated
- 2026-11-02
EUVDEUVD-2023-49904
In JetBrains Ktor before 2.3.5 default configuration of ContentNegotiation with XML format was vulnerable to XXE
- Record
EUVD-2023-49904- CVSS 3.1
- 8.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-q42m-mp58-hxv5
In JetBrains Ktor before 2.3.5 default configuration of ContentNegotiation with XML format was...
In JetBrains Ktor before 2.3.5 default configuration of ContentNegotiation with XML format was vulnerable to XXE
- Record
GHSA-q42m-mp58-hxv5- CVSS 3.1
- 8.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N - Weakness
- CWE-611
- Updated
- 2026-11-02
NVD
In JetBrains Ktor before 2.3.5 default configuration of ContentNegotiation with XML format was vulnerable to XXE
- Record
CVE-2023-45612- CVSS 3.1
- 8.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N - CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-611
- Updated
- 2026-11-02
OSV
In JetBrains Ktor before 2.3.5 default configuration of ContentNegotiation with XML format was vulnerable to XXE
- Record
CVE-2023-45612- CVSS 3.1
- 8.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N - Weakness
- CWE-611
- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | aecelen/ktor-xxe-poc | 2025-10-15 |
| PoC in GitHub | clemfavre/cve-2023-45612_exploit | 2025-10-22 |
| PoC in GitHub | infernosalex/CVE-2023-45612-PoC | 2025-10-03 |
| PoC in GitHub | ksaweryr/CVE-2023-45612-PoC | 2025-11-07 |
| PoC in GitHub | razvanclaudiu/ktor-xxe-poc | 2025-10-23 |
| PoC in GitHub | seraphimi/ktor-xxe | 2025-11-04 |
| PoC in GitHub | stefan-500/ktor-cve-2023-45612-poc | 2025-11-07 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-45612 is a high vulnerability (CVSS 8.6) in Jetbrains Ktor, published October 9, 2023. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 0.71%, the 53rd percentile. No source names a fixed version.