Security readout for executives and security teams
Plain-English summary
This CVE describes an assertion failure in JerryScript 2.2.0 while parsing JavaScript statements. The public record does not provide a CVSS score, CWE, confirmed affected product list, or business impact. Treat it as an uncertain parser reliability issue until vendor or maintainer guidance clarifies severity and remediation.
Executive priority
Track this as an exposure-discovery item, not an emergency, unless JerryScript 2.2.0 is used in externally reachable parsing paths. The current public evidence is too sparse to justify high urgency, but the uncertainty warrants inventory and vendor follow-up.
Technical view
The reported condition is an assertion failure where stack_depth does not equal context_stack_depth in parser_parse_statements at js-parser-statm.c:2756. The available sources identify JerryScript 2.2.0 and a GitHub issue, but do not document exploitability, memory corruption, reachable inputs, fixed versions, or downstream products.
Likely exposure
Exposure is most likely where JerryScript 2.2.0 is directly used or embedded and parses JavaScript supplied by users, files, network content, or external integrations. The CVE metadata lists affected vendor/product as n/a, so downstream exposure cannot be determined from the provided sources.
Exploitation context
CISA KEV is false in the bundle, and no cited source claims active exploitation. The provided evidence supports only an assertion failure report, not weaponized exploit activity or a confirmed production-impact scenario.
Researcher notes
The record lacks CVSS, CWE, CPEs, fixed version, and impact analysis. An assertion failure may indicate denial-of-service risk in some builds, but the provided sources do not prove crash impact, memory safety consequences, or exploitability.
Mitigation direction
- Inventory applications, firmware, and components that include JerryScript 2.2.0.
- Check JerryScript and downstream vendor guidance for fixed releases or patches.
- Limit untrusted JavaScript parsing where JerryScript 2.2.0 is present.
- Monitor the CVE record and GitHub issue for severity or remediation updates.
Validation and detection
- Confirm whether JerryScript is present through SBOMs, dependency manifests, or build records.
- Verify the exact JerryScript version in affected products or firmware.
- Identify whether any affected component parses externally supplied JavaScript.
- Record vendor advisory status, patch availability, and compensating controls.
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-2020-23309 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
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/jerryscript-project/jerryscript/issues/3820CVE reference · x_refsource_CONFIRM
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.