Server-Side Request Forgery in Concrete CMS
Concrete CMS (formerly concrete5) versions below 8.5.7 has a SSRF mitigation bypass using DNS Rebind attack giving an attacker the ability to fetch cloud IAAS (ex AWS) IAM keys.To fix this Concrete CMS no longer allows downloads from the local network and specifies the validated IP when downloading rather than relying on DNS.Discoverer.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | concrete5/core | < 8.5.7 | 8.5.7 |
References
- Weakness (CWE)
CWE-918- Platform
- Composer
- Package
concrete5/core- Disclosed
- 23.11.2021
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-mcxr-fx5f-96qq - CC BY 4.0
Vulnerability history: concrete5/core
All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 9
- First → latest
- 11.2021 06.2022
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 1
- High 3
- Medium 4
- Low 1
Disclosures per year
- 2021: 6
- 2022: 3
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 0
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Server-Side Request Forgery in Concrete CMS this entry
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