23 Oct 2026 15:48:27 UTC
Concrete CMS 9.5.2 and below is vulnerable to Stored XSS in RSS Displayer Block via Unescaped Remote Feed Item title
cve-program · CVE-2026-68528 · Published
CVE-2026-68528
Concrete CMS · Vulnerability
CVSS 4.0 6.0 MEDIUMCheck source for fixed versionsKEV status unknown
cve-program · CVE-2026-68528
PublishedConcrete CMS RSS Displayer block below version 9.5.3 rendered remote feed item titles without HTML escaping, resulting in stored cross-site scripting. An attacker able to control a title in a syndicated feed could execute script in the site origin for any visitor to the affected page, including administrators, without holding an account on that site. The Concrete CMS security team gave this vulnerability a CVSS v4.0 score of 6.0 with vector CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks riodrwn for reporting.
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