CVE-2025-57731Network attack vector

Stored script execution via Mermaid diagram content

Published Aug 20, 2025 · Updated Aug 20, 2025

Stored XSS in JetBrains YouTrack before 2025.2.92387 allows remote authenticated users to execute script through Mermaid diagram content. JetBrains identifies the Mermaid diagram content path but has not disclosed the parser or sanitizer operation that permits the stored payload to reach page rendering. Low-privileged access is required to store the content, and another user must view the diagram; execution can read or alter data in that user's browser context but does not interrupt the service.

CVSS severity8.7
High
EPSS probability0.28%
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 YouTrack before 2025.2.92387 allows remote authenticated users to execute script through Mermaid diagram content. JetBrains identifies the Mermaid diagram content path but has not disclosed the parser or sanitizer operation that permits the stored payload to reach page rendering. Low-privileged access is required to store the content, and another user must view the diagram; execution can read or alter data in that user's browser context but does not interrupt the service.

The record

CVE
CVE-2025-57731
Published
Aug 20, 2025
Updated
Aug 20, 2025
Vendor
JetBrains
Product
YouTrack
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 20, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 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 <2025.2.92387

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

JetBrains · YouTrackversion=0 <2025.2.92387

Published CVSS scores

8.7JetBrainsCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
5.4NVDCVSS: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 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')
T1059.007Command and Scripting Interpreter: JavaScript

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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