RCE in Creative Themes Blocksy Companion Pro

CVE-2026-40783

Contributor Remote Code Execution (RCE) in Blocksy Companion Pro <= 2.1.37 versions.

Vulnerability class: RCE (Remote Code Execution)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.008 (54.6th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 54.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-40783: held from 0.005 to 0.008.

EPSS over last 30 days · oldest: 0.005 · newest: 0.008 · change: +0.002

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-40783?
CVE-2026-40783 is a critical-severity vulnerability in Creative Themes Blocksy Companion Pro, classified under Code Injection. CVSS score: 9.9/10. Published 2026-06-17.
How severe is CVE-2026-40783?
Critical severity. CVSS v3 base score is 9.9 out of 10.