Quick answers
- Is CVE-2026-40783 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-40783 being exploited in the wild.
- How severe is CVE-2026-40783?
- Critical severity, with a CVSS score of 9.9, published 17 June 2026.
- Which products and versions are affected?
- Creative Themes Blocksy Companion Pro <= 2.1.37.
- Is there a fix for CVE-2026-40783?
- A patch was published on 2026-06-17: Patch confirmed available in version 2.1.38 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-40783 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-40783?
- Check whether you run Creative Themes Blocksy Companion Pro at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A Remote Code Execution (RCE) vulnerability exists in the Blocksy Companion Pro plugin for WordPress due to improper control of code generation (CWE-94). The flaw allows an authenticated attacker with at least 'Contributor' privileges to inject and execute arbitrary PHP code on the server. The vulnerability is assigned a CVSS score of 9.9 because it allows for a total impact on confidentiality, integrity, and availability, and can lead to a full site compromise. The issue is resolved in version 2.1.38.
Affected products
- Creative Themes Blocksy Companion Pro <= 2.1.37
Timeline
- 2026-03-13: other: Reported by Nguyen Ba Khanh
- 2026-04-22: disclosed: Initial disclosure by Patchstack
- 2026-06-17: advisory: NVD publication date
- 2026-06-17: patched: Patch confirmed available in version 2.1.38