What is CVE-2024-31351?

CVE-2024-31351 is a critical-severity vulnerability in Copymatic, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 10.0/10. Published 2024-05-17.

How severe is CVE-2024-31351?

Critical severity. CVSS v3 base score is 10.0 out of 10.

Is CVE-2024-31351 known to be exploited?

4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Arbitrary file upload in Copymatic

CVE-2024-31351

Unrestricted Upload of File with Dangerous Type vulnerability in Copymatic Copymatic – AI Content Writer & Generator.This issue affects Copymatic – AI Content Writer & Generator: from n/a through 1.6.

Vulnerability class: Unrestricted File Upload

Published 2024-05-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.016 (75.1th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 75.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

Public proof-of-concept exploits

References

patchstack.com/database/vulnerability/copymatic/wordpress-copymatic-plugin-1-6-… (Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2024-31351?: CVE-2024-31351 is a critical-severity vulnerability in Copymatic, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 10.0/10. Published 2024-05-17.
How severe is CVE-2024-31351?: Critical severity. CVSS v3 base score is 10.0 out of 10.
Is CVE-2024-31351 known to be exploited?: 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.