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CVE-2026-3242GHSA-W9QG-CHFH-G3Q9

Concrete CMS below 9.4.8 is vulnerable to Stored XSS in the Switch Language block

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 9.4.8
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: partial

Summary

In Concrete CMS below version 9.4.8, a rogue administrator can add stored XSS via the Switch Language block.  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 M3dium for reporting.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: partial

  3. Record last updated

Affected versions

  • Concrete CMS Concrete CMS

    From 5 · fixed in 9.4.8

  • concrete5/concrete5Packagist

    fixed in 9.4.8

References 2

GitHub · concretecms/concretecms

documentation.concretecms.org