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.
Metrics
Affected Vendors & Products
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Advisories
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Fixes
Solution
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Workaround
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References
History
Wed, 04 Mar 2026 03:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Concrete CMS below 9.4.8 is vulnerable to Stored XSS via Legacy form | |
| Weaknesses | CWE-79 | |
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| Metrics |
cvssV4_0
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Projects
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MITRE
Status: PUBLISHED
Assigner: ConcreteCMS
Published:
Updated: 2026-03-04T02:15:53.400Z
Reserved: 2026-02-26T01:42:11.496Z
Link: CVE-2026-3240
Vulnrichment
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NVD
Status : Received
Published: 2026-03-04T03:16:04.940
Modified: 2026-03-04T03:16:04.940
Link: CVE-2026-3240
Redhat
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OpenCVE Enrichment
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Weaknesses