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Medium, CVSS 5.1

Cross site scripting in Concrete CMS

CVE-2024-8291GHSA-q7qr-22qw-pqgx

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (concrete5/concrete5 9.3.4, 8.5.19), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS 4.0
5.1 · CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N · score source
EPSS
  • CVE-2024-8291: 0.53% estimated exploitation activity in the next 30 days; percentile 45.09 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

Concrete CMS versions 9.0.0 to 9.3.3 and below 8.5.19 are vulnerable to Stored XSS in Image Editor Background Color. A rogue admin could add malicious code to the Thumbnails/Add-Type.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from ghsa record GHSA-q7qr-22qw-pqgx

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2024-8291

Advisory: Cross site scripting in Concrete CMS
IDs: CVE-2024-8291, GHSA-q7qr-22qw-pqgx
Record: https://patchnext.com/advisories/cve-2024-8291 (revision 1, source checked 26 Oct 2026, 14:29 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: concrete5/concrete5 9.3.4, 8.5.19. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist concrete5/concrete5: affected >= 9.0.0, < 9.3.4; < 8.5.19; fixed in 8.5.19, 9.3.4

## Suggested inspection (read-only)
- Packagist concrete5/concrete5: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on concrete5/concrete5.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-q7qr-22qw-pqgx (GitHub-reviewed advisory GHSA-q7qr-22qw-pqgx lists affected ranges: Packagist concrete5/concrete5 >=9.0.0 =0 <8.5.19)

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