CVE-2023-41249Network attack vector

Reflected XSS via Build Step copy flow

Published Aug 25, 2023 · Updated Sep 27, 2024

Reflected XSS in JetBrains TeamCity before 2023.05.3 allows remote authenticated users to execute script during Build Step copying. JetBrains identifies the Build Step copy flow as the affected locus but withholds the vulnerable parameter and server-side rendering operation. A low-privileged account and user interaction are required; successful exploitation runs attacker-controlled script in the affected user's browser.

CVSS severity4.6
Medium
EPSS probability55.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in JetBrains TeamCity before 2023.05.3 allows remote authenticated users to execute script during Build Step copying. JetBrains identifies the Build Step copy flow as the affected locus but withholds the vulnerable parameter and server-side rendering operation. A low-privileged account and user interaction are required; successful exploitation runs attacker-controlled script in the affected user's browser.

The record

CVE
CVE-2023-41249
Published
Aug 25, 2023
Updated
Sep 27, 2024
Vendor
JetBrains
Product
TeamCity
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 25, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 27, 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 <2023.05.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

JetBrains · TeamCityversion=0 <2023.05.3

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.6JetBrains s.r.o.CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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')
T1059.007JavaScript/JScript

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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