CVE-2023-31874Public exploit

Arbitrary code execution via crafted Markdown file

Published May 28, 2023 · Updated Jan 14, 2025

Code injection in Yank Note 3.52.1 allows attackers to execute arbitrary code when a crafted Markdown file is opened. The Markdown preview renders attacker-controlled HTML event handlers with access to parent.parent.nodeRequire, which invokes child_process.execSync to launch operating-system commands. Exploitation requires a local user to open the untrusted document, after which the payload runs with that user's application privileges and can read, modify, or delete accessible data.

CVSS severity8.8
High
EPSS probability4.90%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in Yank Note 3.52.1 allows attackers to execute arbitrary code when a crafted Markdown file is opened. The Markdown preview renders attacker-controlled HTML event handlers with access to parent.parent.nodeRequire, which invokes child_process.execSync to launch operating-system commands. Exploitation requires a local user to open the untrusted document, after which the payload runs with that user's application privileges and can read, modify, or delete accessible data.

The record

CVE
CVE-2023-31874
Published
May 28, 2023
Updated
Jan 14, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-732, T1204.002
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. May 28, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 14, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-732Incorrect Permission Assignment for Critical Resource
T1204.002User Execution: Malicious File

Public exploit references

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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