CVE-2021-22970 Server-Side Request Forgery in Concrete CMS
Attackers can exploit SSRF in Concrete CMS to read files from local LAN servers and bypass mitigations via DNS rebinding.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-22970?
CVE-2021-22970 is a high-severity server-side request forgery vulnerability in Concretecms Concrete Cms, published on 19 Nov 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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
Weakness: CWE-918
Which versions are affected by CVE-2021-22970?
2 open source packages ship an affected version, including concrete5/core. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
concrete5/core Packagist | All versions | 8.5.7 |
concrete5/core Packagist | All versions | 8.5.7 |
Products include Concretecms Concrete Cms.
How do I fix CVE-2021-22970?
Upgrade concrete5/core to 8.5.7 or later.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2021-22970 being exploited?
There is no known exploitation of CVE-2021-22970 in the wild and no public exploit code.
Other vulnerabilities in Concretecms Concrete Cms
- CVE-2023-48648 Concrete CMS allows unauthorized access because directories can be created with insecure permissions
- CVE-2022-21829 Code injection in concrete CMS
- CVE-2021-22958 Server-Side Request Forgery vulnerability in concrete5
- CVE-2021-40098 Path traversal in n/a
- CVE-2026-8134 Concrete CMS Vulnerable to Relative Path Traversal
Sources
Also known as GHSA-gqpw-9q54-9x28.