Security readout for executives and security teams
Plain-English summary
CVE-2020-36375 describes a stack overflow in Cesanta MJS 1.20.1. If an exposed system lets an attacker supply a crafted file to the MJS parser, the likely impact is service crash or denial of service, not confirmed data theft or code execution.
Executive priority
Treat this as a targeted availability risk. Prioritize systems where MJS parses externally supplied content or supports business-critical services. Urgency is lower where MJS is absent, not reachable, or only handles trusted local files.
Technical view
The reported flaw is in parse_equality in Cesanta MJS 1.20.1. The CVE describes stack exhaustion triggered by a crafted file, allowing denial of service. The source bundle provides no CVSS score, CWE, fixed version, or complete affected CPE data.
Likely exposure
Exposure is most likely where Cesanta MJS 1.20.1 parses untrusted or remotely supplied files. Organizations should check embedded, IoT, or application components that bundle MJS, but the sources do not name downstream products.
Exploitation context
The source bundle does not show CISA KEV listing or cite active exploitation. A public GitHub issue is referenced, but the provided evidence supports only crafted-file denial of service, not weaponized exploitation or broader impact.
Researcher notes
Evidence is sparse: no CVSS vector, CWE, CPEs, or fix are provided in the bundle. Focus research on confirming version presence, parser reachability, and vendor-maintained remediation rather than assuming broader exploitability.
Mitigation direction
- Inventory applications and firmware for Cesanta MJS 1.20.1.
- Check Cesanta project guidance for a fixed or recommended version.
- Reduce or block untrusted file parsing through MJS where possible.
- Isolate services using MJS from critical workloads.
- Monitor crash telemetry for parser-related denial-of-service patterns.
Validation and detection
- Confirm whether MJS 1.20.1 exists in SBOMs or vendored source.
- Map remote inputs that can reach the MJS parser.
- Review service logs for crashes during JavaScript or file parsing.
- Verify any upgrade or workaround against vendor guidance.
- Track the GitHub issue and CVE record for remediation updates.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2020-36375 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/cesanta/mjs/issues/136CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.