Neos Flow Information disclosure in entity security
If you had used entity security and wanted to secure entities not just based on the user's role, but on some property of the user (like the company he belongs to), entity security did not work properly together with the doctrine query cache. This could lead to other users re-using SQL queries from the cache which were built for other users; and thus users could see entities which were not destined for them.
Am I affected?
- Do you use Entity Security? if no, you are not affected.
- You disabled the Doctrine Cache (Flow_Persistence_Doctrine)? If this is the case, you are not affected.
- You use Entity Security in custom Flow or Neos applications. Read on.
- If you only used Entity Security based on roles (i.e. role A was allowed to see entities, but role B was denied): In this case, you are not affected.
- If you did more advanced stuff using Entity Security (like checking that a customer only sees his own orders; or a hotel only sees its own bookings), you very likely needed to register a custom global object in Neos.Flow.aop.globalObjects. In this case, you are affected by the issue; and need to implement the CacheAwareInterface in your global object for proper caching.
All Flow versions (starting in version 3.0, where Entity Security was introduced) were affected.
| Software | From | Fixed in |
|---|---|---|
neos / flow
|
3.0.0 | 3.0.12 |
|
neos / flow
|
3.1.0 | 3.1.10 |
|
neos / flow
|
3.2.0 | 3.2.13 |
|
neos / flow
|
3.3.0 | 3.3.13 |
|
neos / flow
|
4.0.0 | 4.0.6 |
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Frequently Asked Questions
A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.
CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.
A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.
Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.
Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.
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