CVE-2023-34225Network attack vector

Stored XSS via NuGet feed page

Published May 31, 2023 · Updated Jan 9, 2025

Stored XSS in JetBrains TeamCity before 2023.05 allows remote authenticated users to run script in another user's browser via the NuGet feed page. JetBrains identifies the affected locus as the NuGet feed page but has not disclosed which stored field accepts the payload or which output-encoding operation is missing. Low-privileged access and a user's visit to the page are required, bounding the consequence to script execution in that user's TeamCity web origin.

CVSS severity4.6
Medium
EPSS probability60.72%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in JetBrains TeamCity before 2023.05 allows remote authenticated users to run script in another user's browser via the NuGet feed page. JetBrains identifies the affected locus as the NuGet feed page but has not disclosed which stored field accepts the payload or which output-encoding operation is missing. Low-privileged access and a user's visit to the page are required, bounding the consequence to script execution in that user's TeamCity web origin.

The record

CVE
CVE-2023-34225
Published
May 31, 2023
Updated
Jan 9, 2025
Vendor
JetBrains
Product
TeamCity
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 31, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 9, 2025Record 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 <2023.05

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

JetBrains · TeamCityversion=0 <2023.05

Published CVSS scores

4.6JetBrainsCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/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-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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