PT-2023-29592 · Jetbrains · Jetbrains Ktor

Published 2023-10-09 · Updated 2023-10-12 · CVE-2023-45612

Positive Technologies (AI Summary)

CVSS v2.0

10

Critical

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions JetBrains Ktor versions prior to 2.3.5

Description The default configuration of ContentNegotiation with XML format in JetBrains Ktor is vulnerable to XXE.

Recommendations For versions prior to 2.3.5, update to version 2.3.5 or later to resolve the issue. As a temporary workaround, consider disabling the XML format in the ContentNegotiation configuration until a patch is available. Restrict access to the ContentNegotiation module to minimize the risk of exploitation. Avoid using the XML format in the affected API endpoints until the issue is resolved.

Fix

XXE

Weakness Enumeration

CWE-611

Related Identifiers

BDU:2025-13192

CVE-2023-45612

Affected Products

Jetbrains Ktor

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2023-45612 · Security Note
• https://bdu.fstec.ru/vul/2025-13192 · Security Note
• https://jetbrains.com/privacy-security/issues-fixed · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-45612 · Vendor Advisory
• https://github.com/seraphimi/ktor-xxe · Note
• https://t.me/cibsecurity/71826 · Telegram Post
• https://twitter.com/VulmonFeeds/status/1711358364452610374 · Twitter Post
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-45612 · Note
• https://twitter.com/CVEnew/status/1711330669660438770 · Twitter Post