CVE-2020-23312Public exploitNetwork attack vector

Interpreter crash via malformed object initializer

Published Jun 10, 2021 · Updated Aug 4, 2024

Reachable assertion in the JerryScript 2.2.0 JavaScript parser allows attackers to crash the interpreter via crafted source code. The ObjectInitializer parser mishandles a string-literal property definition followed by a comma, leaves scanning unsuccessful, and then reaches the parser_parse_source assertion. Execution of attacker-controlled JavaScript is required, and the bounded consequence is process termination rather than data access or modification.

CVSS severity7.5
High
EPSS probability1.08%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reachable assertion in the JerryScript 2.2.0 JavaScript parser allows attackers to crash the interpreter via crafted source code. The ObjectInitializer parser mishandles a string-literal property definition followed by a comma, leaves scanning unsuccessful, and then reaches the parser_parse_source assertion. Execution of attacker-controlled JavaScript is required, and the bounded consequence is process termination rather than data access or modification.

The record

CVE
CVE-2020-23312
Published
Jun 10, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-617, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 10, 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

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.0NVDAV:N/AC:L/Au:N/C:N/I:N/A:P

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-617Reachable Assertion
T1499.004Application 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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