CVE-2026-68528
Concrete CMS 9.5.2 and below is vulnerable to Stored XSS in RSS Displayer Block via Unescaped Remote Feed Item title
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
Concrete 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.
| CWE | CWE-79 |
| Vendor | concrete cms |
| Product | concrete cms |
| Published | Sep 11, 2026 |
| Last Updated | Sep 11, 2026 |
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Affected Versions
Concrete CMS / Concrete CMS
5.0.0 ≤ 9.5.2
References
Credits
riodrwn