CVE-2024-56356Network attack vector

Authenticated data disclosure via insecure XML parsing

Published Dec 20, 2024 · Updated Dec 20, 2024

XXE in JetBrains TeamCity before 2024.12 allows remote authenticated users to read server-accessible data via crafted XML input. An XMLParser accepts attacker-controlled XML with external-entity processing enabled, causing referenced resources to be resolved. Low-privileged network access is required, and JetBrains has not disclosed the affected request path or parsing call site.

CVSS severity5.9
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XXE in JetBrains TeamCity before 2024.12 allows remote authenticated users to read server-accessible data via crafted XML input. An XMLParser accepts attacker-controlled XML with external-entity processing enabled, causing referenced resources to be resolved. Low-privileged network access is required, and JetBrains has not disclosed the affected request path or parsing call site.

The record

CVE
CVE-2024-56356
Published
Dec 20, 2024
Updated
Dec 20, 2024
Vendor
JetBrains
Product
TeamCity
Classifications
CWE-611, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 20, 2024CVE publishedPublication date reported by the CVE source.
  2. Dec 20, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2024.12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

JetBrains · TeamCityversion=0 <2024.12

Published CVSS scores

7.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
5.9JetBrainsCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-611Improper Restriction of XML External Entity Reference
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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