Improper Privilege Management in Concrete CMS
Privilege escalation from Editor to Admin using Groups in Concrete CMS versions 8.5.6 and below. If a group is granted "view" permissions on the bulkupdate page, then users in that group can escalate to being an administrator with a specially crafted curl. Fixed by adding a check for group permissions before allowing a group to be moved.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | concrete5/core | < 8.5.7 | 8.5.7 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-269- Platform
- Composer
- Package
concrete5/core- Disclosed
- 23.11.2021
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-j4mv-2rv7-v2j9 - 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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Improper Privilege Management in Concrete CMS this entry
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