What’s Vulnerable › Vulnerabilities
CVE-2022-21829
- Severity: critical (CVSS 9.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 1.8% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2022-06-24 · updated 2026-06-17
- Weakness: CWE-319
Description
Concrete CMS Versions 9.0.0 through 9.0.2 and 8.5.7 and below can download zip files over HTTP and execute code from those zip files which could lead to an RCE. Fixed by enforcing ‘concrete_secure’ instead of ‘concrete’. Concrete now only makes requests over https even a request comes in via http. Concrete CMS security team ranked this 8 with CVSS v3.1 vector: AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H Credit goes to Anna for reporting HackerOne 1482520.
Affected products
- Concrete CMS: before 8.5.8; from 9.0.0 before 9.1.0 — fixed in 8.5.8, 9.1.0
How to fix
Upgrade to a fixed version: Concrete CMS 8.5.8, 9.1.0. Check the vendor advisory for mitigations.
References
- https://documentation.concretecms.org/developers/introduction/version-history/858-release-notes
- https://documentation.concretecms.org/developers/introduction/version-history/910-release-notes%2C
- https://hackerone.com/reports/1482520%2C
- https://documentation.concretecms.org/developers/introduction/version-history/858-release-notes
- https://documentation.concretecms.org/developers/introduction/version-history/910-release-notes%2C
- https://hackerone.com/reports/1482520%2C
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