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Medium severity4.8NVD Advisory· Published May 22, 2026· Updated May 22, 2026

CVE-2026-8353

CVE-2026-8353

Description

Concrete CMS version 9.0 to 9.5.0 is vulnerable to Stored XSS via page name in the Atomik theme. A rogue editor can inject arbitrary JavaScript that executes in the context of any authenticated user visiting the affected account pages. This can lead to session hijacking, credential theft, malicious actions performed on behalf of users, and potential privilege escalation. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.1 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks Yonatan Drori (Tenzai) for reporting.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

2
  • Concrete5/Concrete52 versions
    cpe:2.3:a:concretecms:concrete_cms:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:a:concretecms:concrete_cms:*:*:*:*:*:*:*:*range: >=9.0,<9.5.1
    • (no CPE)range: 9.0 to 9.5.0

Patches

Vulnerability mechanics

References

1

News mentions

1