Concrete CMS 9.5.0 and below has Stored XSS on the height parameter. The controller does not validate or sanitize $height. Any user with editor privileges can inject malicious JavaScript that executes in the context of any visitor's browser, potentially leading to session hijacking, credential theft, or other malicious actions. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 7.3 with vector CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N. Thanks Alfin Joseph for reporting.
Metrics
Affected Vendors & Products
References
History
Fri, 22 May 2026 14:30:00 +0000
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Thu, 21 May 2026 23:00:00 +0000
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Concretecms concrete Cms |
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Thu, 21 May 2026 21:00:00 +0000
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| Description | Concrete CMS 9.5.0 and below has Stored XSS on the height parameter. The controller does not validate or sanitize $height. Any user with editor privileges can inject malicious JavaScript that executes in the context of any visitor's browser, potentially leading to session hijacking, credential theft, or other malicious actions. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 7.3 with vector CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N. Thanks Alfin Joseph for reporting. | |
| Title | Concrete CMS 9.5.0 and below has Stored XSS on the height parameter | |
| Weaknesses | CWE-79 | |
| References |
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| Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: ConcreteCMS
Published:
Updated: 2026-05-22T13:21:51.854Z
Reserved: 2026-05-09T00:02:43.920Z
Link: CVE-2026-8203
Updated: 2026-05-22T13:21:45.094Z
Status : Received
Published: 2026-05-21T21:16:33.380
Modified: 2026-05-21T21:16:33.380
Link: CVE-2026-8203
No data.
OpenCVE Enrichment
Updated: 2026-05-21T23:15:17Z