CVE-2021-22970 json
Server-Side Request Forgery in Concrete CMS
published 2021-11-19 4 y ago modified 2026-06-17 4 mo ago also GHSA-gqpw-9q54-9x28 , EUVD-2021-2351
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.5%
- EPSS 1.5% chance of exploitation in 30 days, percentile 74%
- public exploits
- 0
- none known
Summary
Concrete CMS (formerly concrete5) versions 8.5.6 and below and version 9.0.0 allow local IP importing causing the system to be vulnerable toa. SSRF attacks on the private LAN servers by reading files from the local LAN. An attacker can pivot in the private LAN and exploit local network appsandb. SSRF Mitigation Bypass through DNS RebindingConcrete CMS security team gave this a CVSS score of 3.5 AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:NConcrete CMS is maintaining Concrete version 8.5.x until 1 May 2022 for security fixes.This CVE is shared with HackerOne Reports https://hackerone.com/reports/1364797 and https://hackerone.com/reports/1360016Reporters: Adrian Tiron from FORTBRIDGE (https://www.fortbridge.co.uk/ ) and Bipul Jaiswal
Patch / fix
- packagist concrete5/core 8.5.7
Exploit prediction
1.49% chance of exploitation in the next 30 days, higher than 74% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:P/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | concrete5/core | <8.5.7 |
8.5.7 |
Affected products
- n/a https://github.com/concrete5/concrete5
Classification
- Weakness
-
- CWE-918 Server-Side Request Forgery
References
-
documentation.concretecms.org
/developers/introduction/version-history/857-release-notes
web, release-notes, vendor-advisory
-
documentation.concretecms.org
/developers/introduction/version-history/901-release-notes
web, release-notes, vendor-advisory
-
hackerone.com
/reports/1364797
web, permissions-required
-
nvd.nist.gov
/vuln/detail/CVE-2021-22970
advisory
Sources
- CVE List CVE-2021-22970
- GitHub Advisory GHSA-gqpw-9q54-9x28
- NVD CVE-2021-22970
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