PT-2026-42562 · Unknown · Concrete Cms

Winston Crooker · Published 2026-05-21 · Updated 2026-05-22 · CVE-2026-8240

Positive Technologies (AI Summary)

CVSS v4.0

6.3

Medium

Base vector

AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions Concrete CMS versions prior to 9.5.1

Description Unauthenticated users can access page metadata on any page that has a configured summary template. This allows for the disclosure of private, draft, and restricted pages, leaking information such as the title, path, description, and author.

Recommendations Update to a version newer than 9.5.0.

Fix

Improper Access Control

Weakness Enumeration

CWE-284

Related Identifiers

CVE-2026-8240

Affected Products

Concrete Cms

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-8240 · Security Note
• https://twitter.com/CVEnew/status/2057783217042677767 · Twitter Post
• https://t.me/CVEtracker/54559 · Telegram Post
• https://twitter.com/infoflowcloud/status/2057785108262797463 · Twitter Post
• https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notes · Note