CVE-2020-23302

CRITICAL

There is a heap-use-after-free at ecma-helpers-string.c:772 in ecma_ref_ecma_string in JerryScript 2.2.0

Affects 1 product across 1 vendor.

CVSS 3.19.8
EPSS1.3%
Percentile69th
PatchPatched
CVSS Vector — Plain English Remotely exploitable over the network, low complexity, no authentication required, no user interaction needed, impact contained to the vulnerable component, full confidentiality impact, full integrity impact, full availability impact.
CWE Weakness Definitions
CWE-416: Use After Free

Software references memory after it has been freed, leading to corruption, crashes, or code execution.

◆ AI Analysis — automated analysis, not human-reviewed

A heap-use-after-free vulnerability exists in JerryScript 2.2.0 at ecma-helpers-string.c:772 in the ecma_ref_ecma_string function, which could allow an attacker to execute arbitrary code.

BSID: BS-2021-GLOBAL-148420-C • Model: /workspace/models/qwen2.5-coder-32b-instruct-bf16 • Confidence: HIGH

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Frequently Asked Questions
What is CVE-2020-23302?
A heap-use-after-free vulnerability exists in JerryScript 2.2.0 at ecma-helpers-string.c:772 in the ecma_ref_ecma_string function, which could allow an attacker to execute arbitrary code.
What is the CVSS score for CVE-2020-23302?
CVE-2020-23302 has CVSS 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS: 1.3%.
Is CVE-2020-23302 actively exploited?
No confirmed active exploitation of CVE-2020-23302 as of 2026-05-30.
How do I remediate CVE-2020-23302?
Priority: IMMEDIATE.
What systems are affected by CVE-2020-23302?
CVE-2020-23302 affects Jerryscript Jerryscript.
Vulnerability Details
CVE IDCVE-2020-23302
BSIDBS-2021-GLOBAL-148420-C BreachSpider Global ID
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published2021-06-10
Last Modified2024-11-21
ICS Relevance0%
Weakness (CWE)
Use After Free
SourceNVD
Official Description

There is a heap-use-after-free at ecma-helpers-string.c:772 in ecma_ref_ecma_string in JerryScript 2.2.0

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

An attacker can exploit this vulnerability by crafting a specific JavaScript payload that triggers the heap-use-after-free condition, potentially leading to remote code execution.

Exploitation Likelihood: HIGH

Affected Products
VendorProductAffected Versions
Jerryscript Jerryscript 2.2.0
Remediation

No official vendor advisory link on record. See the CVE record →

Threat Intelligence
● Threat Intelligence Validated: October 2026 | Threat Age: 1953 Days
CISA known-exploitedNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
AI Enrichment Record — provenance & audit hash
Model/workspace/models/qwen2.5-coder-32b-instruct-bf16
ConfidenceHIGH
Enriched At2026-05-24
SHA-512 Audit Hash3b0cd2d46469ab72240d0aa06b183dac068fa4a64e85af56b6fcdaa3720eea025d1c1ab67fc55306a34a94cb42e4c54228c85fa41dd309af935ce649de32c425
Related CVEs affecting Jerryscript
CVE-2019-1010176 9.8 JerryScript commit 4e58ccf68070671e1fff5cd6673f0c1d5b80b166 is affected by: B... CVE-2017-18212 9.8 An issue was discovered in JerryScript 1.0. There is a heap-based buffer over... CVE-2018-11418 9.8 An issue was discovered in JerryScript 1.0. There is a heap-based buffer over... CVE-2018-11419 9.8 An issue was discovered in JerryScript 1.0. There is a heap-based buffer over... CVE-2020-23303 9.8 There is a heap-buffer-overflow at jmem-poolman.c:165 in jmem_pools_collect_e...
View all Jerryscript CVEs →

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