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.
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Affected Vendors & Products
References
History
Wed, 04 Mar 2026 21:45:00 +0000
| Type | Values Removed | Values Added |
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| CPEs | cpe:2.3:a:concretecms:concrete_cms:*:*:*:*:*:*:*:* | |
| Metrics |
cvssV3_1
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Wed, 04 Mar 2026 16:15:00 +0000
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| Metrics |
ssvc
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Wed, 04 Mar 2026 15:00:00 +0000
| Type | Values Removed | Values Added |
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| First Time appeared |
Concretecms
Concretecms concrete Cms |
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| Vendors & Products |
Concretecms
Concretecms concrete Cms |
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 | |
| References |
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| Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: ConcreteCMS
Published: 2026-03-04T02:15:53.400Z
Updated: 2026-03-04T15:33:21.842Z
Reserved: 2026-02-26T01:42:11.496Z
Link: CVE-2026-3240
Updated: 2026-03-04T15:32:50.021Z
Status : Analyzed
Published: 2026-03-04T03:16:04.940
Modified: 2026-03-04T21:32:44.683
Link: CVE-2026-3240
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