GitHub Advisoryadvisory · Packagist

GHSA-h72c-xx3w-w8h7 Concrete CMS is vulnerable to Stored XSS via OAuth integration name

HIGH Published 2026-05-21 Modified 2026-06-24 Official page ↗
Aliases
CVE-2026-8197
Ecosystem
Packagist
Packages
concrete5/concrete5
Severity
High
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Weaknesses
CWE-79
Reviewed
2026-06-24

Affected packages

• Packagist concrete5/concrete5: < 9.5.1 → fixed in 9.5.1

Description

Concrete CMS 9.5.0 and below is vulnerable to Stored XSS via OAuth integration name. The OAuth authorize template renders the integration name (admin-controlled) through Concrete's t() translation helper as a sprintf-style format. The ... wrap is built by PHP string interpolation before t() runs, so the integration name lands in the translated output as raw HTML. A rogue admin could potentially snoop on login submissions.The Concrete CMS security team thanks Yonatan Drori (Tenzai) for reporting this issue.

Related

Alias · CVE (1)

  • CVE-2026-8197 Concrete CMS 9.5.0 and below is vulnerable to Stored XSS via OAuth integration name. vulnerability

Weakness · CWE (1)

  • CWE-79 Improper Neutralization of Input During Web Page Generation weakness

References