CVE-2025-47851Network attack vector

Stored script execution via GitHub Checks webhook

Published May 20, 2025 · Updated May 20, 2025

Stored XSS in the GitHub Checks Webhook in JetBrains TeamCity before 2025.03.2 allows remote authenticated users to run script in a viewer's browser. JetBrains identifies the GitHub Checks webhook as the input path but has not published which payload field is stored or which rendering path fails to encode it. Exploitation requires high-privilege access to supply webhook content and user interaction to view it; resulting script runs with TeamCity-origin permissions.

CVSS severity4.8
Medium
EPSS probability2.65%
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 the GitHub Checks Webhook in JetBrains TeamCity before 2025.03.2 allows remote authenticated users to run script in a viewer's browser. JetBrains identifies the GitHub Checks webhook as the input path but has not published which payload field is stored or which rendering path fails to encode it. Exploitation requires high-privilege access to supply webhook content and user interaction to view it; resulting script runs with TeamCity-origin permissions.

The record

CVE
CVE-2025-47851
Published
May 20, 2025
Updated
May 20, 2025
Vendor
JetBrains
Product
TeamCity
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 20, 2025CVE publishedPublication date reported by the CVE source.
  2. May 20, 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 <2025.03.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

JetBrains · TeamCityversion=0 <2025.03.2

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
4.8JetBrains s.r.o.CVSS:3.1/AV:N/AC:L/PR:H/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 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')
T1203Exploitation for Client Execution

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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