CVE-2021-4280Network attack vector

Application crash via unsanitized TextGrid label

Published Dec 25, 2022 · Updated Apr 14, 2025

Denial of service in file_segmenter.praat in Will Styler's Praat Script Collection allows attackers to crash Praat via a crafted TextGrid. The script appends each TextGrid segment label directly to an output filename, so a slash becomes a path separator and causes an immediate crash. Exploitation requires a user to run the script on the crafted TextGrid; the documented consequence is interruption of that Praat session.

CVSS severity4.3
Medium
EPSS probability0.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in file_segmenter.praat in Will Styler's Praat Script Collection allows attackers to crash Praat via a crafted TextGrid. The script appends each TextGrid segment label directly to an output filename, so a slash becomes a path separator and causes an immediate crash. Exploitation requires a user to run the script on the crafted TextGrid; the documented consequence is interruption of that Praat session.

The record

CVE
CVE-2021-4280
Published
Dec 25, 2022
Updated
Apr 14, 2025
Vendor
Will Styler
Product
Will Styler's Praat Script Collection
Classifications
CWE-404, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 25, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 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?

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  1. Affected versionversion=n/a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Will Styler · Will Styler's Praat Script Collectionversion=n/a

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
4.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

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

CWE-404Improper Resource Shutdown or Release
T1204.002User Execution: Malicious File

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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