GHSA-q9fm-mpg8-8jqm

Suggest an improvement
Source
https://github.com/advisories/GHSA-q9fm-mpg8-8jqm
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-q9fm-mpg8-8jqm/GHSA-q9fm-mpg8-8jqm.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-q9fm-mpg8-8jqm
Aliases
Published
2026-05-26T13:30:17Z
Modified
2026-09-10T03:50:47Z
Severity
  • 2.1 (Low) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
Concrete CMS is vulnerable to Stored XSS via page name in the Atomik theme
Details

Concrete CMS version 9.0 to 9.5.0 is vulnerable to Stored XSS via page name in the Atomik theme. A rogue editor can inject arbitrary JavaScript that executes in the context of any authenticated user visiting the affected account pages. This can lead to session hijacking, credential theft, malicious actions performed on behalf of users, and potential privilege escalation. Thanks Yonatan Drori (Tenzai) for reporting.

Database specific
{
    "cwe_ids":  [
        "CWE-79"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-06-29T23:04:41Z",
    "nvd_published_at":  "2026-05-22T15:16:26Z",
    "severity":  "LOW"
}
References

Affected packages

Packagist / concrete5/concrete5

Package

Name
concrete5/concrete5
Purl
pkg:composer/concrete5/concrete5

Affected ranges

Type
ECOSYSTEM
Events
Introduced
9.0.0RC.1
Fixed
9.5.1

Affected versions

9.*
9.0.0RC1
9.0.0RC3
9.0.0RC4
9.0.0
9.0.1
9.0.2
9.1.0
9.1.1
9.1.2
9.1.3
9.2.0RC2
9.2.0
9.2.1
9.2.2
9.2.3
9.2.4
9.2.5
9.2.6
9.2.7
9.2.8
9.2.9
9.3.0
9.3.1
9.3.2
9.3.3
9.3.4
9.3.5
9.3.6
9.3.7
9.3.8
9.3.9
9.4.0RC1
9.4.0RC2
9.4.0
9.4.1
9.4.2
9.4.3
9.4.4
9.4.5
9.4.6
9.4.7
9.4.8
9.5.0RC1
9.5.0RC2
9.5.0

Database specific

source
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-q9fm-mpg8-8jqm/GHSA-q9fm-mpg8-8jqm.json"