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GHSA-gjwq-9v8p-47w7

LowCVSS 2.1 / 10
Published May 22, 2026·Last modified Jun 24, 2026
Affected Components(0)

No affected components available

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.

Risk Scores
Base Score
2.1

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs high-level or administrative privileges. No user interaction is needed for the attacker to exploit this vulnerability.

Threat Intelligence
0.5

Limited exploitation activity has been observed. Close monitoring and planned remediation are recommended.

EPSS
0.15%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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