CVE-2017-7725 Concrete CMS vulnerable to cross-site scripting (XSS)
Attackers can inject malicious scripts via Host header poisoning in concrete5 when canonical URL is unset, leading to XSS for visitors.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2017-7725?
CVE-2017-7725 is a medium-severity cross-site scripting vulnerability in Concretecms Concrete Cms, published on 13 Apr 2017. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
concrete5 8.1.0 places incorrect trust in the HTTP Host header during caching, if the administrator did not define a "canonical" URL on installation of concrete5 using the "Advanced Options" settings. Remote attackers can make a GET request with any domain name in the Host header; this is stored and allows for arbitrary domains to be set for certain links displayed to subsequent visitors, potentially an XSS vector.
Weakness: CWE-79
Which versions are affected by CVE-2017-7725?
2 open source packages ship an affected version, including concrete5/concrete5. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
concrete5/concrete5 Packagist | All versions to 8.1.0 | None |
concrete5/concrete5 Packagist | All versions to 8.1.0 | None |
Products include Concretecms Concrete Cms.
How do I fix CVE-2017-7725?
No fix has been published for CVE-2017-7725 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2017-7725 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2017-7725 exists.
Public exploit code: 1 Exploit-DB entry.
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-2mvg-c6mg-3q63.