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Fri, 11 Sep 2026 23:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Concrete CMS versions 9.5.0 through 9.5.2 are vulnerable to Open Redirect via the rcURL parameter. An attacker can craft a single link on the site's own domain that sends a user to an arbitrary external site immediately after authentication, facilitating phishing and credential theft. The same handling is present in the registration flow, giving a second entry point on sites with registration enabled. Concrete CMS versions prior to 9.5.0 do not include the rcURL parameter or this allowlist and are not affected. The Concrete CMS security team gave this vulnerability a CVSS v4.0 score of 5.3 with vector CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks Michal M. for reporting. | |
| Title | Concrete CMS versions 9.5.0 through 9.5.2 are vulnerable to Open Redirect via the rcURL parameter. | |
| Weaknesses | CWE-601 | |
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| Metrics |
cvssV4_0
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Subscriptions
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Status: PUBLISHED
Assigner: ConcreteCMS
Published:
Updated: 2026-09-11T19:36:02.510Z
Reserved: 2026-08-27T18:21:25.201Z
Link: CVE-2026-81913
Updated: 2026-09-11T19:35:56.975Z
Status : Received
Published: 2026-09-11T20:19:14.140
Modified: 2026-09-11T20:19:14.140
Link: CVE-2026-81913
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