CVE-2020-13623Public exploitNetwork attack vector

Process crash via unchecked Proxy recursion

Published May 26, 2020 · Updated Aug 4, 2024

Stack exhaustion in JerryScript 2.2.0 allows remote attackers to crash an embedding process through crafted Proxy object operations. Self-referential Proxy prototype chains make ecma_proxy_object_get and ecma_proxy_object_set recurse without enforcing the engine's stack limit. The host must execute attacker-controlled JavaScript with Proxy support; exhaustion terminates the affected process without reported data access or modification.

CVSS severity7.5
High
EPSS probability1.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack exhaustion in JerryScript 2.2.0 allows remote attackers to crash an embedding process through crafted Proxy object operations. Self-referential Proxy prototype chains make ecma_proxy_object_get and ecma_proxy_object_set recurse without enforcing the engine's stack limit. The host must execute attacker-controlled JavaScript with Proxy support; exhaustion terminates the affected process without reported data access or modification.

The record

CVE
CVE-2020-13623
Published
May 26, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-400, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 26, 2020CVE 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

5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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.

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 exploitPublished

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499Endpoint Denial of Service

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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