CVE-2026-23495

The API endpoint for listing Predefined Properties in the Pimcore platform lacks adequate server-side authorization checks. Predefined Properties are configurable metadata definitions (e.g., name, key, type, default value) used across documents, assets, and objects to standardize custom attributes and improve editorial workflows, as documented in Pimcore's official properties guide. Testing confirmed that an authenticated backend user without explicit permissions for property management could successfully call the endpoint and retrieve the complete list of these configurations. This exemplifies Broken Access Control (OWASP Top 10 A01:2021), enabling unauthorized access to administrative features and potentially violating role-based access controls inherent to Pimcore's multi-user environment.

Details

The backend user without permission was still able to list "Predefined Properties" item

Step to Reproduce the issue

login as Admin (full permission) and clicked "Predefined Properties"

Then, captured and saved the request:

• List API

Next, login a backend user with no permission

The copy the "Cookie" and "X-Pimcore-Csrf-Token"

After that, pasted the copied "Cookie" and "X-Pimcore-Csrf-Token" to captured request

-List API

Exploitation allows low-privileged users to enumerate all Predefined Properties, exposing internal metadata schemas, default values, and configuration details that may reveal business logic, data classification strategies, or sensitive defaults (e.g., proprietary keys or select options). In a PIM system like Pimcore, this could facilitate reconnaissance for further attacks, such as targeted data manipulation or privilege escalation, leading to unauthorized alterations of asset/object properties. For organizations handling regulated content (e.g., e-commerce catalogs under GDPR or PCI DSS), such exposure risks compliance breaches, intellectual property leakage, and operational inconsistencies from unintended property overrides.

CVE-2026-23495 has a CVSS score of 4.3 (Medium). The vector is network-reachable, low privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (2.2.3, 1.7.16); upgrading removes the vulnerable code path.

Kodem intelligence

1. What is CVE-2026-23495? CVE-2026-23495 is a medium-severity security vulnerability in pimcore/admin-ui-classic-bundle (composer), affecting versions >= 2.0.0-RC1, <= 2.2.2. It is fixed in 2.2.3, 1.7.16.
2. How severe is CVE-2026-23495? CVE-2026-23495 has a CVSS score of 4.3 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
3. Which versions of pimcore/admin-ui-classic-bundle are affected by CVE-2026-23495? pimcore/admin-ui-classic-bundle (composer) versions >= 2.0.0-RC1, <= 2.2.2 is affected.
4. Is there a fix for CVE-2026-23495? Yes. CVE-2026-23495 is fixed in 2.2.3, 1.7.16. Upgrade to this version or later.
5. Is CVE-2026-23495 exploitable, and should I be worried? Whether CVE-2026-23495 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
6. What actually determines whether CVE-2026-23495 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
7. How do I fix CVE-2026-23495?
   • Upgrade pimcore/admin-ui-classic-bundle to 2.2.3 or later
   • Upgrade pimcore/admin-ui-classic-bundle to 1.7.16 or later