CVE-2023-35054Network attack vector

Stored script execution via Markdown rendering

Published Jun 12, 2023 · Updated Jan 3, 2025

Stored XSS in JetBrains YouTrack before 2023.1.10518 allows remote authenticated users to execute script through rendered Markdown. The Markdown-rendering engine emits attacker-controlled stored markup without sufficient neutralization; JetBrains has not disclosed the parser locus. A low-privileged user must store the payload and another user must view the rendered content, exposing that viewer's accessible data and actions.

CVSS severity4.6
Medium
EPSS probability0.97%
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 2023.1.10518 allows remote authenticated users to execute script through rendered Markdown. The Markdown-rendering engine emits attacker-controlled stored markup without sufficient neutralization; JetBrains has not disclosed the parser locus. A low-privileged user must store the payload and another user must view the rendered content, exposing that viewer's accessible data and actions.

The record

CVE
CVE-2023-35054
Published
Jun 12, 2023
Updated
Jan 3, 2025
Vendor
JetBrains
Product
YouTrack
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 12, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 3, 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 <2023.1.10518

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

JetBrains · YouTrackversion=0 <2023.1.10518

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 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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