---
id: CVE-2026-81907
title: >-
  Concrete CMS 9.5.2 and below is vulnerable to Cross-Site Request Forgery
  (CSRF) in the Express "Clear Entries" function (POST
  /index.php/dashboard/system/express/entities/delete_entries) because the
  controller records but does not enforc…
summary: >-
  Concrete CMS 9.5.2 and below is vulnerable to Cross-Site Request Forgery
  (CSRF) in the Express "Clear Entries" function (POST
  /index.php/dashboard/system/express/entities/delete_entries) because the
  controller records but does not enforc…
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N'
cwe:
  - CWE-352
vendor: concretecms
product: concrete_cms
affected:
  - concrete_cms < 9.5.3
patched:
  - concrete_cms 9.5.3
published: '2026-09-11'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T20:02:32.330'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-81907'
references:
  - url: >-
      https://documentation.concretecms.org/developers/introduction/version-history/953-release-notes
    label: ff5b8ace-8b95-4078-9743-eac1ca5451de
tags:
  - nvd
  - cve.org
epss: 0.00137
epssPercentile: 0.02567
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-14T12:51:03.281243Z'
scores:
  nvd: 7.1
  cna: 6.1
ingestedAt: '2026-09-14T15:23:07.429Z'
---

## Overview

Concrete CMS 9.5.2 and below is vulnerable to Cross-Site Request Forgery (CSRF) in the Express "Clear Entries" function (POST /index.php/dashboard/system/express/entities/delete_entries) because the controller records but does not enforce a failed CSRF token check, allowing the destructive operation to proceed when the token is missing or invalid. A remote unauthenticated attacker can force an authenticated administrator who visits an attacker-controlled page to permanently delete all entries belonging to an attacker-selected Express entity on a web application to which the administrator is currently authenticated. Because the default Contact Express object ships with a fixed entity UUID, the target identifier can be obtained without dashboard access. The Concrete CMS security team gave this vulnerability a CVSS v4.0 score of 6.1 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N. Thanks Pratik Zanjurne for reporting.

## Affected

- `concrete_cms < 9.5.3`

## Remediation

Upgrade past the affected range:

- `concrete_cms 9.5.3`