High severity8.8NVD Advisory· Published Sep 27, 2021· Updated Jun 17, 2026

CVE-2021-40097

Description

An issue was discovered in Concrete CMS through 8.5.5. Authenticated path traversal leads to to remote code execution via uploaded PHP code, related to the bFilename parameter.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Concrete5/Concrete52 versions
cpe:2.3:a:concretecms:concrete_cms:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:concretecms:concrete_cms:*:*:*:*:*:*:*:*range: <=8.5.5
- (no CPE)range: <=8.5.5
Concrete CMS/Concrete CMSdescription

Patches

Vulnerability mechanics

References

documentation.concretecms.org/developers/introduction/version-history/856-release-notesnvdRelease NotesVendor Advisory
hackerone.com/reports/1102067nvdPermissions RequiredThird Party Advisory

News mentions

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epss	0.002
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ransomware	0.000