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Not in CISA KEV
LOW severity

CVE-2022-30120 — core

LOW

CVE-2022-30120 is a low-severity (CVSS 3.1) Cross-site Scripting (XSS) vulnerability in concrete5/core. A fix is available for concrete5/core — see the affected versions and patch details below.

Cross site scripting in Concrete CMS

Also known asGHSA-m2ww-6wv6-vw3c
Published
Updated
Affected
2 pkgs
Patched
2 / 2
Exploits
None indexed
Exploitation data as of Nov 5, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.0%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs63th percentile — riskier than 63% of all scored CVEsHighest risk
0.13%0.59%1.04%1.50%0.6%1.0%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

2 pkgs affected
🐘concrete5/core🐘concrete5/core

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

XSS in /dashboard/blocks/stacks/view_details/ - old browsers only. When using an older browser with built-in XSS protection disabled, insufficient sanitation where built urls are outputted can be exploited for Concrete 8.5.7 and below as well as Concrete 9.0 through 9.0.2 to allow XSS. This cannot be exploited in modern-day web browsers due to an automatic input escape mechanism. Concrete CMS Security team ranked this vulnerability 3.1with CVSS v3.1 Vector AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N. Sanitation has been added where built urls are output. Credit to Credit to Bogdan Tiron from FORTBRIDGE (https://www.fortbridge.co.uk/ ) for reporting

Affected Packages

2 total 2 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistconcrete5/core≥ 9.0.0&&< 9.1.09.1.0composer require concrete5/core:^9.1.0
🐘Packagistconcrete5/coreall versions8.5.8composer require concrete5/core:^8.5.8

Affected Products

1 product · 2 configurations
Application
concrete cmsconcretecms
≥ 9.0.0 && < 9.1.0
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for concrete5/core, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update concrete5/core to 9.1.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2022-30120 is resolved across your whole dependency graph.

  3. Workarounds

    Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

XSS in /dashboard/blocks/stacks/view_details/ - old browsers only. When using an older browser with built-in XSS protection disabled, insufficient sanitation where built urls are outputted can be exploited for Concrete 8.5.7 and below as well as Concrete 9.0 through 9.0.2 to allow XSS. This cannot be exploited in modern-day web browsers due to an automatic input escape mechanism. Concrete CMS Security team ranked this vulnerability 3.1with CVSS v3.1 Vector AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N. Sanitation has been added where built urls are output. Credit to Credit to Bogdan Tiron from FORTBRIDG
O3 Security · Impact-Aware SCA

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CVE-2022-30120: core XSS — Fixed in 9.1.0