What is GHSA-58c8-vvqw-cm7m?

GHSA-58c8-vvqw-cm7m is a security advisory published by GitHub Security Advisories with Medium severity. Concrete CMS 9.5.0 and below is vulnerable to IDOR combined with a missing authentication gate....

Which CVE IDs does GHSA-58c8-vvqw-cm7m cover?

GHSA-58c8-vvqw-cm7m covers the following CVE IDs: CVE-2026-8236. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

GHSA-58c8-vvqw-cm7mMedium

Concrete CMS 9.5.0 and below is vulnerable to IDOR combined with a missing authentication gate....

Vendor

GitHub Security Advisories

Published

May 22, 2026

Last Modified

May 22, 2026

🔗 CVE IDs covered (1)

CVE-2026-8236 →

📋 Description

Concrete CMS 9.5.0 and below is vulnerable to IDOR combined with a missing authentication gate. The endpoint /ccm/system/dialogs/file/usage/{fID} accepts an integer file ID in the URL and returns internal site structure data (page IDs, versions, URL paths) to anyone who sends a GET request. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 6.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N. Thanks Winston Crooker for reporting.

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-8236
https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notes
https://github.com/advisories/GHSA-58c8-vvqw-cm7m