Is CVE-2026-68534 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-68534 being exploited in the wild.

How severe is CVE-2026-68534?

Informational severity, with a CVSS score of 2.3, published 15 September 2026.

Is there a fix for CVE-2026-68534?

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-2026-68534 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-68534?

Check whether you run Concrete CMS 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-2026-68534: Concrete CMS stored cross-site scripting in Express entry labels

CVE-2026-68534 · Severity: info · CVSS 2.3 · Published 2026-09-15

Concrete CMS, a popular open-source content management system, had a vulnerability where user-submitted data in Express Forms was not properly sanitized before display. An attacker could inject malicious code through a public form, which would then execute in administrators' browsers when they viewed associated entries, or in visitors' browsers viewing pages with Express Entry List blocks, potentially allowing attackers to steal credentials or perform unauthorized actions.

Technologies: Concrete CMS. Vendors: Concrete CMS.

Quick answers

Is CVE-2026-68534 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-68534 being exploited in the wild.
How severe is CVE-2026-68534?: Informational severity, with a CVSS score of 2.3, published 15 September 2026.
Which products and versions are affected?: Concrete CMS before 9.5.3.
Is there a fix for CVE-2026-68534?: 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-2026-68534 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-68534?: Check whether you run Concrete CMS 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

This is a stored cross-site scripting (XSS) vulnerability in Concrete CMS versions before 9.5.3. The vulnerability exists in how Express entry labels are rendered when displaying associated entries—the application renders these labels as raw HTML without proper escaping or sanitization. An unauthenticated attacker can submit a payload through a public Express Form. The injected payload persists in the database and executes when an administrator views the associated entry in the dashboard, or when any visitor accesses a page containing an Express Entry List block with association columns displayed. This allows attackers to perform actions with the privileges of the compromised user. The vulnerability has been patched in version 9.5.3.

Affected products

Concrete CMS Concrete CMS before 9.5.3

Timeline

2026-09-15: disclosed

References

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