Is CVE-2026-15100 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-15100 being exploited in the wild.

How severe is CVE-2026-15100?

Medium severity, with a CVSS score of 6.4, published 24 July 2026.

Which products and versions are affected?

WPXPO Post Grid Gutenberg Blocks – PostX up to, and including, 5.0.32.

Is there a fix for CVE-2026-15100?

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-2026-15100 attacked?

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

Am I affected by CVE-2026-15100?

Check whether you run WPXPO Post Grid Gutenberg Blocks – PostX 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-2026-15100: WPXPO PostX Stored XSS in searchnoresult block attribute

CVE-2026-15100 · Severity: medium · CVSS 6.4 · Published 2026-07-24

The PostX plugin for WordPress, which provides advanced layout blocks for website design, contains a security flaw that allows users with contributor-level access to inject malicious scripts into pages. This is particularly dangerous because a low-privileged user could create a draft post that, when previewed by a site administrator, executes code in the administrator's browser. This could lead to unauthorized site modifications or the theft of sensitive administrative session information.

Vendors: WPXPO.

Quick answers

Is CVE-2026-15100 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-15100 being exploited in the wild.
How severe is CVE-2026-15100?: Medium severity, with a CVSS score of 6.4, published 24 July 2026.
Which products and versions are affected?: WPXPO Post Grid Gutenberg Blocks – PostX up to, and including, 5.0.32.
Is there a fix for CVE-2026-15100?: 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-2026-15100 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-15100?: Check whether you run WPXPO Post Grid Gutenberg Blocks – PostX 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 Post Grid Gutenberg Blocks – PostX plugin for WordPress is vulnerable to Stored Cross-Site Scripting (XSS) due to insufficient input sanitization and output escaping on the 'searchnoresult' block attribute. An authenticated attacker with at least Contributor-level permissions can inject malicious JavaScript into a block. When an Editor or Administrator previews or views the post containing this block, the script executes within their browser context. This cross-privilege escalation vector can be used to perform actions on behalf of the administrator. The vulnerability is present in all versions up to and including 5.0.32.

Affected products

WPXPO Post Grid Gutenberg Blocks – PostX up to, and including, 5.0.32

Timeline

2026-07-24: disclosed
2026-07-24: advisory

References

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