Categories
CVE-2026-3240

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

Summary

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

Original description

The description as published by the source.

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.

Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV

References

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