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CVE-2026-3240

Concrete CMS below 9.4.8 is vulnerable to Stored XSS via Legacy form PUBLISHED

Description (CNA)

In Concrete CMS below version 9.4.8, a user with permission to edit a page with element Legacy form can perform a stored XSS attack towards high-privilege accounts via the Question field. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 4.8 with vector CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N Thanks minhnn42, namdi and quanlna2 from VCSLab-Viettel Cyber Security for reporting.

Affected (CNA)

Vendor / productVersions
Concrete CMS / Concrete CMSaffected 5 before 9.4.8

CWE

CWE-79

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.