# CVE-2026-81922: Concrete CMS authorization bypass in sitemap page reordering

Source: https://junglewise.ai/threats/cve-2026-81922-concrete-cms-authorization-bypass-in-sitemap-page-reordering  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-15. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-81922 · Severity: low · CVSS 2.7 · Published 2026-09-15

Concrete CMS is a content management system used to build and manage websites. An authenticated user with access to the sitemap dashboard could bypass page-level permission checks to reorder pages in the site's navigation, even if they lack edit or arrange rights on those specific pages. This could allow an attacker to alter the public navigation structure and potentially hide or reorganize critical content.

Technologies: [Concrete CMS](https://junglewise.ai/threats/technologies/concrete-cms). Vendors: [Concrete CMS](https://junglewise.ai/threats/vendors/concrete-cms).

## Quick answers

**Is CVE-2026-81922 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-81922 being exploited in the wild.

**How severe is CVE-2026-81922?** Low severity, with a CVSS score of 2.7, published 15 September 2026.

**Which products and versions are affected?** Concrete CMS before 9.5.3.

**Is there a fix for CVE-2026-81922?** 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-2026-81922 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-81922?** 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

The vulnerability is an authorization bypass in the sitemap Explore dashboard controller. The send_to_top and send_to_bottom reorder tasks performed only a generic sitemap-access check before operating on a page identified by the attacker-controlled cNodeID parameter, without verifying that the authenticated user held move or arrange permission on that specific page. An authenticated attacker with access to the sitemap but lacking edit/arrange rights on target pages can POST requests with a controlled cNodeID to reorder any page in the site hierarchy. The fix is available in Concrete CMS 9.5.3 and later.

## Affected products

- Concrete CMS Concrete CMS before 9.5.3

## Timeline

- 2026-09-15: disclosed

## References

- [https://github.com/concretecms/concretecms](https://github.com/concretecms/concretecms)
- [https://documentation.concretecms.org/developers/introduction/version-history/953-release-notes](https://documentation.concretecms.org/developers/introduction/version-history/953-release-notes)

## Related threats

- [Concrete CMS OAuth REST API authorization bypass](https://junglewise.ai/threats/cve-2026-85387-concrete-cms-oauth-rest-api-authorization-bypass)
- [Concrete CMS unauthenticated Express entry search disclosure](https://junglewise.ai/threats/cve-2026-18120-concrete-cms-unauthenticated-express-entry-search-disclosure)
- [Concrete CMS REST API user creation permission bypass](https://junglewise.ai/threats/cve-2026-87031-concrete-cms-rest-api-user-creation-permission-bypass)
- [Concrete CMS access control bypass in board custom-slot preview](https://junglewise.ai/threats/cve-2026-87028-concrete-cms-access-control-bypass-in-board-custom-slot-preview)
- [Concrete CMS stored XSS via XML file upload in Form Block](https://junglewise.ai/threats/cve-2026-85386-concrete-cms-stored-xss-via-xml-file-upload-in-form-block)