CVE-2021-37549Network attack vector

Data access and modification via workflow sandbox escape

Published Aug 6, 2021 · Updated Aug 4, 2024

Insufficient workflow sandboxing in JetBrains YouTrack before 2021.1.11111 allows remote attackers to read and modify data. The public record identifies the workflow sandbox as the affected locus but does not disclose which restriction fails or which workflow operation crosses the boundary. Exploitation is network-reachable and requires no authentication or user interaction; the published assessment limits impact to confidentiality and integrity.

CVSS severity9.1
Critical
EPSS probability1.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insufficient workflow sandboxing in JetBrains YouTrack before 2021.1.11111 allows remote attackers to read and modify data. The public record identifies the workflow sandbox as the affected locus but does not disclose which restriction fails or which workflow operation crosses the boundary. Exploitation is network-reachable and requires no authentication or user interaction; the published assessment limits impact to confidentiality and integrity.

The record

CVE
CVE-2021-37549
Published
Aug 6, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
Unavailable
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 6, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
6.4NIST NVDAV:N/AC:L/Au:N/C:P/I:P/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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