CVE-2026-7890

CVSS Score & Metrics

Base Score

6.4 / 10

Vector String

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

Vulnerability 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.

Vulnerability Details

Published Date

May 21, 2026

Last Modified

May 22, 2026

CWE ID

CWE-918

Source

NVD

Vendor

concretecms

Product

concrete_cms

External References

https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notes

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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