CVE-2017-7725
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.
Does this matter?
A public exploit is published in Exploit-DB (verified), so the technical barrier is gone even though the severity is medium and EPSS is 2.8%. Treat it as high on anything reachable from the internet.
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.
- CVSS 3.1
- 6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 2.75% probability · 86th percentile
- Public exploits
- 1 in Exploit-DB · verified · first 14 April 2017
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- concretecms/concrete cms
- Source
- cve@mitre.org
EPSS 2.8% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://hyp3rlinx.altervista.org/advisories/CONCRETE5-v8.1.0-HOST-HEADER-INJECTION.txtExploit, Third Party Advisory
- http://www.securityfocus.com/bid/97649Third Party Advisory, VDB Entry
- https://hackerone.com/reports/148300Exploit, Third Party Advisory, VDB Entry
- https://packetstormsecurity.com/files/142145/concrete5-8.1.0-Host-Header-Injection.htmlExploit, Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/41885/Exploit, Third Party Advisory, VDB Entry
- http://hyp3rlinx.altervista.org/advisories/CONCRETE5-v8.1.0-HOST-HEADER-INJECTION.txtExploit, Third Party Advisory
- http://www.securityfocus.com/bid/97649Third Party Advisory, VDB Entry
- https://hackerone.com/reports/148300Exploit, Third Party Advisory, VDB Entry
- https://packetstormsecurity.com/files/142145/concrete5-8.1.0-Host-Header-Injection.htmlExploit, Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/41885/Exploit, Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.