CVE Explorer

CVE-2026-8205

Concrete CMS 9.5.0 and below is vulnerable to authorization bypass in the Calendar Block since action_get_events does not check canView on the calendar which results in restricted event details being disclosed. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 6.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N. Thanks lalalala5678 for reporting.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:86bfc10430b62f8706eeb07dd055f7c3274b55f26986549520763edaacfd02f3

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"collectionURL":"https://github.com/concretecms/concretecms","defaultStatus":"unaffected","product":"Concrete CMS","repo":"https://github.com/concretecms/concretecms","vendor":"Concrete CMS","versions":[{"lessThanOrEqual":"9.5.0","status":"affected","version":"5.0","versionType":"git"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:901305f2ddef8421b2992983c7fdb693d6855401084958af25234cb8e98316dc · sha256:62aa8a2b5c2d9b05… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":6.3,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpa…

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:901305f2ddef8421b2992983c7fdb693d6855401084958af25234cb8e98316dc · sha256:62aa8a2b5c2d9b05… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion

{"cweId":"CWE-425","description":"CWE-425 Direct request ('forced browsing')","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:901305f2ddef8421b2992983c7fdb693d6855401084958af25234cb8e98316dc · sha256:62aa8a2b5c2d9b05… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion

{"tags":["release-notes"],"url":"https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notes"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:901305f2ddef8421b2992983c7fdb693d6855401084958af25234cb8e98316dc · sha256:62aa8a2b5c2d9b05… · /containers/cna/references/0

Attribution and limitations

CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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