Security readout for executives and security teams
Plain-English summary
CVE-2020-23308 is a reported assertion failure in JerryScript 2.2.0, a lightweight JavaScript engine. The public bundle does not provide severity, CVSS, affected product packaging, or confirmed impact. Treat it as a potential reliability issue where JerryScript parses or executes untrusted JavaScript.
Executive priority
Track as inventory-driven risk, not an emergency, unless JerryScript 2.2.0 processes untrusted input in critical products. The public record lacks severity and exploitation evidence.
Technical view
The issue is described as an assertion in parser_parse_expression at js-parser-expr.c:3565 in JerryScript 2.2.0. The sources do not state a CWE, exploitability, fixed version, or whether this only affects assertion-enabled builds. Evidence supports parser assertion failure, not broader memory corruption claims.
Likely exposure
Exposure is likely limited to products, firmware, or applications embedding JerryScript 2.2.0. The CVE bundle lists no vendor CPEs or packaged downstream products, so teams need dependency, SBOM, and firmware inventory checks.
Exploitation context
The provided sources do not report active exploitation, and the CVE is not listed as KEV in the bundle. A GitHub issue is referenced, but the bundle does not establish weaponization, remote reachability, or production impact.
Researcher notes
The source evidence is sparse: one CVE description and a GitHub issue reference. Validate build configuration, assertion behavior, and input reachability before assigning operational severity.
Mitigation direction
- Identify any use of JerryScript 2.2.0 in applications, firmware, or third-party components.
- Check JerryScript project guidance and the linked issue for fixed versions or official workarounds.
- Avoid exposing JerryScript parsing to untrusted JavaScript until vendor guidance is confirmed.
- Isolate affected components so parser crashes cannot disrupt critical services.
Validation and detection
- Search SBOMs, lockfiles, source trees, and firmware manifests for JerryScript 2.2.0.
- Confirm whether embedded builds enable assertions in production.
- Map all paths where untrusted JavaScript reaches JerryScript parsing.
- Review monitoring for crashes in components embedding JerryScript.
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-2020-23308 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/3819CVE 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.