Express association reordering via missing CSRF validation
Published May 21, 2026 · Updated May 21, 2026
Cross-site request forgery in Concrete CMS 9.0 through 9.5.0 allows remote attackers to reorder Express associations via crafted requests. The Express association reorder controller processes state-changing requests without validating a CSRF token, allowing attacker-chosen ordering changes. Exploitation requires an authenticated user with relevant Express permissions to submit an attacker-controlled cross-site request; the resulting impact is limited to Express association ordering integrity.
Summary
What happened
Cross-site request forgery in Concrete CMS 9.0 through 9.5.0 allows remote attackers to reorder Express associations via crafted requests. The Express association reorder controller processes state-changing requests without validating a CSRF token, allowing attacker-chosen ordering changes. Exploitation requires an authenticated user with relevant Express permissions to submit an attacker-controlled cross-site request; the resulting impact is limited to Express association ordering integrity.
The record
- CVE
- CVE-2026-8415
- Published
- May 21, 2026
- Updated
- May 21, 2026
- Vendor
- Concrete CMS
- Product
- Concrete CMS
- Classifications
- CWE-1275, CWE-352, CAPEC-1
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 21, 2026CVE publishedPublication date reported by the CVE source.
- May 21, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=9.0 <=9.5.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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