CVE-2021-23429Public exploitNetwork attack vector

Process crash via uncaught malformed-source exceptions

Published Aug 24, 2021 · Updated Sep 16, 2024

Uncontrolled resource consumption in Bitovi Transpile 2.7.2 and earlier allows attackers to crash a consuming process via crafted source. The .to() method sends unvalidated JavaScript source through format detection and AST transformation without catching parser exceptions. A consuming application must pass attacker-controlled source to the library; successful exploitation terminates its process without reading or altering data.

CVSS severity6.5
Medium
EPSS probability1.02%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in Bitovi Transpile 2.7.2 and earlier allows attackers to crash a consuming process via crafted source. The .to() method sends unvalidated JavaScript source through format detection and AST transformation without catching parser exceptions. A consuming application must pass attacker-controlled source to the library; successful exploitation terminates its process without reading or altering data.

The record

CVE
CVE-2021-23429
Published
Aug 24, 2021
Updated
Sep 16, 2024
Vendor
Bitovi
Product
Transpile
Classifications
CWE-400, CWE-755, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 24, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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?

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?

Bitovi · Transpileversion=0 <unspecified

Published CVSS scores

6.5GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/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.

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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 exploitPublished

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
CWE-755Improper Handling of Exceptional Conditions
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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