GHSA-752x-23hp-jmv6: concrete5/concrete5 (CVE-2026-8411)

Concrete CMS is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/dialog/page/bulk/delete

CVSS 2.3 LowEPSS 0.0013 · 2nd percentile

Published by the GitHub Advisory Database at 22 May 2026, 00:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

Package	Ecosystem	Affected	Fixed in
concrete5/concrete5	Packagist	>=9.0.0RC1, <9.5.1	9.5.1

Identifiers

GHSA-752x-23hp-jmv6 · CVE-2026-8411 · PKSA-ngsw-3psq-jryj

Weakness (CWE)

CWE-352 · CWE-1275

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Concrete CMS (Packagist package concrete5/concrete5) versions 9.0.0RC1 through 9.5.0 are affected by a cross-site request forgery flaw in the bulk page delete dialog. The source does not describe what an attacker can make a logged-in user do beyond this. The fix is included in version 9.5.1, so upgrade concrete5/concrete5 to 9.5.1 or later.

Written 31 Oct 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
2.3	Low	4.0	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N	CNA (ConcreteCMS)

CISA KEV Not listed.
EPSS 0.0013, the 2nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:02 UTC First seen by agentprime
31 Oct 2026, 14:02 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.