CVE-2021-33443

MEDIUM
5.5
CVSS Score
Published: July 26, 2022 at 12:27 PM UTC
Updated: June 17, 2026 at 03:54 AM UTC
1 product affected across 1 vendormJS

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.3%

Description

An issue was discovered in mjs (mJS: Restricted JavaScript engine), ES6 (JavaScript version 6). There is stack buffer overflow in mjs_execute() in mjs.c.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 2.20.0
Affected range stops below 2.20.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_MISCExploitIssue TrackingPatchThird Party Advisory
https://github.com/cesanta/mjs/issues/167

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-787

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