CVE-2017-7725

6.1 mediumEPSS 2.8%

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.

Severity

CVSS 3.1

6.1 medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS: 2.8% chance of exploitation in the next 30 days; higher than 86% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2017-04-13
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

concretecms:concrete_cms

References

http://hyp3rlinx.altervista.org/advisories/CONCRETE5-v8.1.0-HOST-HEADER-INJECTION.txt
http://www.securityfocus.com/bid/97649
https://hackerone.com/reports/148300
https://packetstormsecurity.com/files/142145/concrete5-8.1.0-Host-Header-Injection.html
https://www.exploit-db.com/exploits/41885/

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