CVE-2021-23376Network attack vector

Unauthenticated command execution via unsanitized trimvideo input

Published Apr 18, 2021 · Updated Sep 17, 2024

Command injection in the trimvideo function of Tharaka Romesh ffmpegdotjs in all versions allows remote attackers to execute arbitrary commands via crafted input. The function builds an FFmpeg command and passes attacker-influenced arguments to Node.js child_process.exec without sanitization, allowing shell metacharacters to alter execution. The interface requires an application to expose trimvideo with attacker-controlled values; successful exploitation can run commands with the privileges of the hosting Node.js process and affect confidentiality, integrity, and availability.

CVSS severity9.8
Critical
EPSS probability1.94%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Command injection in the trimvideo function of Tharaka Romesh ffmpegdotjs in all versions allows remote attackers to execute arbitrary commands via crafted input. The function builds an FFmpeg command and passes attacker-influenced arguments to Node.js child_process.exec without sanitization, allowing shell metacharacters to alter execution. The interface requires an application to expose trimvideo with attacker-controlled values; successful exploitation can run commands with the privileges of the hosting Node.js process and affect confidentiality, integrity, and availability.

The record

CVE
CVE-2021-23376
Published
Apr 18, 2021
Updated
Sep 17, 2024
Vendor
Tharaka Romesh
Product
ffmpegdotjs
Classifications
CWE-78, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 18, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <unspecified

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Tharaka Romesh · ffmpegdotjsversion=0 <unspecified

Published CVSS scores

9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8SnykCVSS:3.1/AV:N/AC:L/PR:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo