Security readout for executives and security teams
Plain-English summary
CVE-2020-23302 describes a memory safety flaw in JerryScript 2.2.0. A heap-use-after-free can make software unstable and may create security risk where JerryScript processes attacker-controlled JavaScript. The public record is sparse and does not provide CVSS, confirmed exploitation, or fixed-version details.
Executive priority
Prioritize discovery first. If JerryScript 2.2.0 is embedded in exposed products or untrusted script-processing paths, treat remediation as time-sensitive. If not present, business urgency is low.
Technical view
The issue is reported as a heap-use-after-free in ecma-helpers-string.c at line 772, within ecma_ref_ecma_string, affecting JerryScript 2.2.0. The supplied CVE metadata lacks CWE, CVSS, affected CPEs, exploit details, and remediation specifics beyond the referenced upstream issue.
Likely exposure
Exposure is most likely in products, firmware, or services embedding JerryScript 2.2.0, especially when they evaluate untrusted JavaScript. The CVE affected-product fields are incomplete, so SBOM and source dependency checks are required.
Exploitation context
The source bundle does not show active exploitation. KEV status is false, and no cited source provides public exploitation evidence. Treat exploitability as unconfirmed from these sources, not disproven.
Researcher notes
The public CVE data is minimal. The strongest evidence is the reported heap-use-after-free location and version. There is insufficient source evidence here to rate severity, confirm reachability, name fixed versions, or assert exploitation.
Mitigation direction
- Inventory applications, firmware, and libraries that embed JerryScript.
- Identify any use of JerryScript 2.2.0 specifically.
- Check upstream JerryScript guidance and issue history for fixed versions or patches.
- Reduce or isolate processing of untrusted JavaScript where JerryScript is present.
- Prioritize upgrade or replacement if JerryScript handles external input.
Validation and detection
- Review SBOMs, vendored source, and build manifests for JerryScript.
- Confirm the embedded JerryScript version, not only package names.
- Check whether affected components execute attacker-controlled JavaScript.
- Review crash, sanitizer, or fuzzing findings for matching use-after-free behavior.
- Track the GitHub issue for maintainer-confirmed remediation details.
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-2020-23302 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/3748CVE 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.