Code Injection in total4

Answer in brief

CVE-2021-23390 records a Critical severity (CVSS 9.8) vulnerability in Code Injection in total4. The current sources do not mark it as known exploited. The current feed maps total4 (npm). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Dec 10, 2021Updated Sep 10, 2026Source checked Sep 10, 2026First seen by HOL Sep 10, 2026Material review Sep 10, 2026

Upstream Advisory

Key facts

Risk: Critical · CVSS 9.8
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 9.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps total4 (npm). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
total4npm	>=0 <0.0.43	0.0.43

Recommended response

Check inventory. Check lockfiles and deployed manifests for total4.
Review the reported fix. Update total4 to 0.0.43 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Dec 10, 2021
Evidence: source:osv:source_dates:source-dates:record
Source modified
Sep 10, 2026
Evidence: source:osv:source_dates:source-dates:record
First seen by HOL
Sep 10, 2026

Sources and claim methodology

Upstream source description

The package total4 before 0.0.43 are vulnerable to Arbitrary Code Execution via the `U.set()` and `U.get()` functions.

Quoted source text, attributed separately from HOL analysis.