Translation mapping tampering via missing destination authorization
Published Sep 15, 2026 · Updated Sep 15, 2026
Improper authorization in Concrete CMS before 9.5.3 allows remote authenticated users to alter multilingual page relationships. Backend\Page\Multilingual::assign accepts an arbitrary destination page without checking destination-side permission or validating a CSRF token. The attacker needs Edit Page Multilingual Settings permission on one source page; exploitation can reroute public language pages or remove legitimate translation pairs.
Summary
What happened
Improper authorization in Concrete CMS before 9.5.3 allows remote authenticated users to alter multilingual page relationships. Backend\Page\Multilingual::assign accepts an arbitrary destination page without checking destination-side permission or validating a CSRF token. The attacker needs Edit Page Multilingual Settings permission on one source page; exploitation can reroute public language pages or remove legitimate translation pairs.
The record
- CVE
- CVE-2026-18422
- Published
- Sep 15, 2026
- Updated
- Sep 15, 2026
- Vendor
- Concrete CMS
- Product
- Concrete CMS
- Classifications
- T1565.001
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 15, 2026CVE publishedPublication date reported by the CVE source.
- Sep 15, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=5.0.0 <=9.5.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
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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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