PT-2026-42557 · Unknown · Concrete Cms

0X4C616E · Published 2026-05-21 · Updated 2026-05-22 · CVE-2026-7887

Positive Technologies (AI Summary)

CVSS v4.0

2.3

Low

Base vector

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

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

Description The OAuth 2.0 Authorization-Code Handler fails to verify account status. This allows users who are suspended, banned, or terminated employees, specifically those with the uIsActive variable set to 0, to successfully authenticate via OAuth and obtain valid API tokens.

Recommendations Update to a version newer than 9.5.0.

Fix

Weakness Enumeration

CWE-1287

Related Identifiers

CVE-2026-7887

Affected Products

Concrete Cms

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-7887 · Security Note
• https://twitter.com/infoflowcloud/status/2057785038117179691 · Twitter Post
• https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notes · Note
• https://t.me/cveNotify/164641 · Telegram Post
• https://twitter.com/CVEnew/status/2057783210717687985 · Twitter Post