CVE-2020-36368Network attack vector

Denial of service via recursive parse_statement

Published May 28, 2021 · Updated Aug 4, 2024

Stack overflow in Cesanta MJS 1.20.1 allows remote attackers to cause denial of service through crafted files during statement parsing. The parse_statement parser recursively processes nested statements with parse_block and parse_statement_list until the call stack is exhausted. A crafted file must reach the MJS parser; the documented consequence is service interruption without reported confidentiality or integrity impact.

CVSS severity5.5
Medium
EPSS probability0.82%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack overflow in Cesanta MJS 1.20.1 allows remote attackers to cause denial of service through crafted files during statement parsing. The parse_statement parser recursively processes nested statements with parse_block and parse_statement_list until the call stack is exhausted. A crafted file must reach the MJS parser; the documented consequence is service interruption without reported confidentiality or integrity impact.

The record

CVE
CVE-2020-36368
Published
May 28, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-674, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 28, 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

5.5NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
4.3NVDAV:N/AC:M/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-674Uncontrolled Recursion
T1499Endpoint Denial of Service

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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