CVE-2026-8435
Cross-Site Request Forgery in Concrete CMS
Publication date: 2026-05-21
Last updated on: 2026-05-21
Assigner: ConcreteCMS
Description
Description
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| concrete_cms | concrete_cms | to 9.5.0 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-1275 | The SameSite attribute for sensitive cookies is not set, or an insecure value is used. |
| CWE-352 | The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability affects Concrete CMS versions before 9.5.0 and is a Cross Site Request Forgery (CSRF) issue located at the approveVersion() function in concrete/controllers/backend/file.
CSRF vulnerabilities allow an attacker to trick a user into performing actions on a web application in which they are authenticated, without their consent.
How can this vulnerability impact me? :
An attacker could potentially cause an authenticated user to unknowingly approve file versions within Concrete CMS, leading to unauthorized changes or actions being performed.
However, the CVSS score of 2.3 indicates that the impact is relatively low, with low complexity and requiring user interaction.