CVE-2026-7890

MediumCVSS 6.4/10Last modified Jul 23, 2026

Description

In Concrete CMS 9.5.0 and below, the RSS Displayer block accepts a feed URL from any page editor and fetches it server-side without validation enabling redirect-to-internal bypasses.  The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.1 with a vector CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:L/VA:N/SC:L/SI:N/SA:N.

Metrics

CVSS 3.1 6.4/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Weakness enumeration

CWE-918

Affected software

No affected versions have been published.

Timeline

Published
May 21, 2026
Last modified
Jul 23, 2026
NVD status
Analyzed

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CVE-2026-7890: Medium severity, CVSS 6.4 | Vulnix