Security readout for executives and security teams
Plain-English summary
CVE-2020-13622 is a denial-of-service issue in JerryScript 2.2.0, a lightweight JavaScript engine. A crafted JavaScript scenario involving Proxy object property-key handling can trigger an assertion failure, causing the engine or embedding application to crash.
Executive priority
Treat this as inventory-driven. It is not currently supported by evidence of active exploitation, but embedded JavaScript engine crashes can still affect availability in devices or services that process untrusted scripts.
Technical view
The CVE states that a property key query for a Proxy object returns unintended data in JerryScript 2.2.0, leading to an assertion failure and denial of service. The provided sources do not include CVSS, CWE, CPE, or detailed affected-version ranges beyond 2.2.0.
Likely exposure
Exposure is most likely in products, firmware, or applications that embed JerryScript 2.2.0. Organizations may not see JerryScript directly in package inventories, so SBOMs, embedded component lists, and vendor firmware disclosures matter.
Exploitation context
The bundle provides a public GitHub issue and pull request, but no KEV listing and no cited evidence of active exploitation. The documented impact is denial of service, not code execution or data theft.
Researcher notes
The source evidence is thin: no CVSS, CWE, CPE, or full affected-version matrix is provided. Scope should be limited to JerryScript 2.2.0 unless upstream issue 3787 or pull request 3797 establishes broader version impact.
Mitigation direction
- Identify whether JerryScript 2.2.0 is present in products or firmware.
- Check upstream JerryScript guidance and releases for a version containing the fix.
- Review GitHub pull request 3797 before backporting to maintained forks.
- Ask vendors whether bundled firmware or SDKs include the vulnerable engine.
- Prioritize updates where JavaScript input can be supplied by untrusted users.
Validation and detection
- Search SBOMs and source manifests for JerryScript and version 2.2.0.
- Confirm embedded firmware component versions with vendors or build records.
- Verify deployed builds include the upstream fix or a vendor-fixed release.
- Run existing JavaScript engine regression tests after any upgrade or backport.
- Document any products where the JerryScript version cannot be confirmed.
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-2020-13622 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/3787CVE reference · x_refsource_MISC
- https://github.com/jerryscript-project/jerryscript/pull/3797CVE 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.