Security readout for executives and security teams
Plain-English summary
CVE-2020-23310 describes a JerryScript 2.2.0 parser bug that can trigger an internal assertion failure. Public data does not provide CVSS, CWE, named CPEs, a patch, or confirmed exploitation. Business urgency depends on whether JerryScript parses untrusted JavaScript in your products or firmware.
Executive priority
Treat as inventory-driven. It is not currently supported as a broad emergency, but embedded runtime exposure can be hard to see and should be checked where untrusted JavaScript is parsed.
Technical view
The reported failure is an assertion in JerryScript 2.2.0: context_p->next_scanner_info_p->type == SCANNER_TYPE_FUNCTION, at js-parser-statm.c:733 in parser_parse_function_statement. The source bundle does not establish memory corruption, code execution, affected CPEs, or a fixed release.
Likely exposure
Likely limited to environments embedding JerryScript 2.2.0 or derived code that parse JavaScript. Exposure is higher if input is externally supplied. The CVE record lists no concrete products or CPEs.
Exploitation context
No active exploitation is supported by the supplied sources, and the CVE is not in KEV. The public description only evidences an assertion failure, so exploitability beyond denial-of-service style parser failure is unproven here.
Researcher notes
Evidence is sparse: one CVE description and a GitHub issue reference. Validate the assertion behavior in a controlled, non-production setting only if you maintain affected JerryScript code. Do not infer RCE or a patch from these sources.
Mitigation direction
- Identify products, firmware, or services embedding JerryScript 2.2.0.
- Review JerryScript issue 3821 and vendor guidance for fixed versions or workarounds.
- Avoid parsing untrusted JavaScript with affected runtimes until remediation is confirmed.
- Use input controls or isolation where script parsing cannot be removed.
Validation and detection
- Search SBOMs, dependency manifests, and firmware inventories for JerryScript 2.2.0.
- Confirm whether any identified runtime parses externally supplied JavaScript.
- Review crash logs for parser_parse_function_statement or js-parser-statm.c:733 assertions.
- Track remediation status against upstream or vendor guidance.
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-2020-23310 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/3821CVE 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.