PT-2026-42542 · Unknown · Concrete Cms

Yonatan Drori · Published 2026-05-21 · Updated 2026-05-21 · CVE-2026-8197

Positive Technologies (AI Summary)

CVSS v4.0

7.3

High

Base vector

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

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

Description Stored Cross-Site Scripting (XSS) occurs via the OAuth integration name. The OAuth authorize template renders the admin-controlled integration name using the t() translation helper as a sprintf-style format. Because the HTML wrap is constructed via PHP string interpolation before the t() function executes, the integration name is output as raw HTML. This could allow a malicious administrator to intercept login submissions.

Recommendations Update to a version newer than 9.5.0.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-8197

Affected Products

Concrete Cms

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-8197 · Security Note
• https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notes · Note
• https://t.me/CVEtracker/54548 · Telegram Post