Is CVE-2026-6740 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-6740 being exploited in the wild.

How severe is CVE-2026-6740?

Medium severity, with a CVSS score of 6.4, published 8 July 2026.

Which products and versions are affected?

POSIMYTH Innovations Nexter Blocks <= 4.7.4.

Is there a fix for CVE-2026-6740?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-6740 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-6740?

Check whether you run POSIMYTH Innovations Nexter Blocks 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.

CVE-2026-6740: Nexter Blocks WordPress plugin Stored XSS in commentIcon parameter

Q: Is there a fix for CVE-2026-6740?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

Q: How is CVE-2026-6740 attacked?

It is attacked over the network, in a software library.

Q: Am I affected by CVE-2026-6740?

Check whether you run POSIMYTH Innovations Nexter Blocks 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.

CVE-2026-6740 · Severity: medium · CVSS 6.4 · Published 2026-07-08

Nexter Blocks is a popular WordPress plugin used to build and design website pages. A security flaw allows users with basic contributor-level access to inject malicious scripts into website pages. These scripts will automatically run in the browser of any visitor who views the affected page, potentially leading to unauthorized actions or data theft.

Technologies: POSIMYTH Innovations Nexter Blocks. Vendors: POSIMYTH Innovations.

Quick answers

Is CVE-2026-6740 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-6740 being exploited in the wild.
How severe is CVE-2026-6740?: Medium severity, with a CVSS score of 6.4, published 8 July 2026.
Which products and versions are affected?: POSIMYTH Innovations Nexter Blocks <= 4.7.4.
Is there a fix for CVE-2026-6740?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-6740 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-6740?: Check whether you run POSIMYTH Innovations Nexter Blocks 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

The Nexter Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting (XSS) due to insufficient input sanitization and output escaping on the 'commentIcon' parameter within the tp-post-meta component. This vulnerability allows authenticated attackers with contributor-level permissions or higher to inject arbitrary web scripts into a page. Because the scripts are stored on the server, they will execute in the context of any user's browser session when they visit the compromised page. The issue is addressed in versions following 4.7.4.

Affected products

posimyththemes Nexter Blocks – Gutenberg Blocks, Page Builder & AI Website Builder <= 4.7.4

Timeline

2026-07-08: disclosed
2026-07-08: advisory

References

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