What is CVE-2022-43283?

CVE-2022-43283 is a medium-severity vulnerability in Webassembly Wabt, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 5.5/10. Published 2022-10-28.

How severe is CVE-2022-43283?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Arbitrary file upload in Webassembly Wabt

CVE-2022-43283

wasm2c v1.0.29 was discovered to contain an abort in CWriter::Write.

Vulnerability class: Unrestricted File Upload

Published 2022-10-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.003 (17.6th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 17.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Webassembly Wabt — versions 1.0.29

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

github.com/WebAssembly/wabt/issues/1985 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2022-43283?: CVE-2022-43283 is a medium-severity vulnerability in Webassembly Wabt, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 5.5/10. Published 2022-10-28.
How severe is CVE-2022-43283?: Medium severity. CVSS v3 base score is 5.5 out of 10.