What’s Vulnerable › Vulnerabilities

CVE-2020-22884

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-07-13 · updated 2026-06-17
• Weakness: CWE-120

Description

Buffer overflow vulnerability in function jsvGetStringChars in Espruino before RELEASE_2V09, allows remote attackers to execute arbitrary code.

Affected products

• Espruino: before 2.09 — fixed in 2.09

How to fix

Upgrade to a fixed version: Espruino 2.09. Check the vendor advisory for mitigations.

References

• https://github.com/espruino/Espruino/issues/1799
• https://github.com/espruino/Espruino/issues/1799

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