Concrete CMS 9.5.0 and below is vulnerable to CSRF via Backend\File::approveVersion. Victim with edit_file_contents permission is CSRF'd into publishing an attacker-chosen previously-uploaded version (downgrade to an older version of a file, or activation of a co-editor's unpublished version). The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks Winston Crooker for reporting.
Advisories
No advisories yet.
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Fri, 22 May 2026 18:15:00 +0000
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ssvc
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Fri, 22 May 2026 16:45:00 +0000
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Concretecms
Concretecms concrete Cms |
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Concretecms
Concretecms concrete Cms |
Fri, 22 May 2026 14:30:00 +0000
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| Description | Concrete CMS 9.5.0 and below is vulnerable to CSRF via Backend\File::approveVersion. Victim with edit_file_contents permission is CSRF'd into publishing an attacker-chosen previously-uploaded version (downgrade to an older version of a file, or activation of a co-editor's unpublished version). The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks Winston Crooker for reporting. | |
| Title | Concrete CMS 9.5.0 and below is vulnerable to CSRF via Backend\File::approveVersion | |
| Weaknesses | CWE-352 | |
| References |
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| Metrics |
cvssV4_0
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Projects
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Status: PUBLISHED
Assigner: ConcreteCMS
Published:
Updated: 2026-05-22T17:26:12.832Z
Reserved: 2026-05-11T16:05:50.640Z
Link: CVE-2026-8340
Updated: 2026-05-22T17:26:07.621Z
No data.
No data.
OpenCVE Enrichment
Updated: 2026-05-22T16:30:39Z
Weaknesses