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RedhatCVE
RedhatCVE
•added 2026/06/05 7:24 p.m.•19 views

CVE-2026-8204

Concrete CMS 9.5.0 and below is vulnerable to authorization Bypass in the Calendar Event Frontend Dialog which can allow cross-calendar data disclosure. A public calendar block can be used as a pivot point to access private calendar data. The Concrete CMS security team gave this vulnerability a...

6.3CVSS5.4AI score0.00353EPSS
SaveExploits0References1
Github Security Blog
Github Security Blog
•added 2026/05/21 9:30 p.m.•17 views

Concrete CMS is vulnerable to authorization bypass in the Calendar Event Frontend Dialog

Concrete CMS 9.5.0 and below is vulnerable to authorization Bypass in the Calendar Event Frontend Dialog which can allow cross-calendar data disclosure. A public calendar block can be used as a pivot point to access private calendar data...

6.3CVSS5.8AI score0.00353EPSS
SaveExploits0References3Affected Software1
OSV
OSV
•added 2026/05/21 9:30 p.m.•16 views

GHSA-X2FP-HJ8C-MMXH Concrete CMS is vulnerable to authorization bypass in the Calendar Event Frontend Dialog

Concrete CMS 9.5.0 and below is vulnerable to authorization Bypass in the Calendar Event Frontend Dialog which can allow cross-calendar data disclosure. A public calendar block can be used as a pivot point to access private calendar data...

6.3CVSS5.8AI score0.00353EPSS
SaveExploits0References3
Snyk
Snyk
•added 2026/05/21 9:30 p.m.•11 views

Authorization Bypass Through User-Controlled Key

Overview concrete5/concrete5 is a concrete5 open source CMS. Affected versions of this package are vulnerable to Authorization Bypass Through User-Controlled Key via the Calendar Event Frontend Dialog. An attacker can gain unauthorized access to private calendar data by leveraging a public calend...

6.3CVSS5.8AI score0.00353EPSS
SaveExploits0References2
NVD
NVD
•added 2026/05/21 9:16 p.m.•26 views

CVE-2026-8204

Concrete CMS 9.5.0 and below is vulnerable to authorization Bypass in the Calendar Event Frontend Dialog which can allow cross-calendar data disclosure. A public calendar block can be used as a pivot point to access private calendar data. The Concrete CMS security team gave this vulnerability a...

6.3CVSS0.00353EPSS
SaveExploits0References1
EUVD
EUVD
•added 2026/05/21 8:56 p.m.•32 views

EUVD-2026-31348

Concrete CMS 9.5.0 and below is vulnerable to authorization Bypass in the Calendar Event Frontend Dialog which can allow cross-calendar data disclosure. A public calendar block can be used as a pivot point to access private calendar data. The Concrete CMS security team gave this vulnerability a...

6.3CVSS5.8AI score0.00353EPSS
SaveExploits0References1
Vulnrichment
Vulnrichment
•added 2026/05/21 8:56 p.m.•17 views

CVE-2026-8204 Concrete CMS 9.5.0 and below is vulnerable to Authorization Bypass in the Calendar Event Frontend Dialog

Concrete CMS 9.5.0 and below is vulnerable to authorization Bypass in the Calendar Event Frontend Dialog which can allow cross-calendar data disclosure. A public calendar block can be used as a pivot point to access private calendar data. The Concrete CMS security team gave this vulnerability a...

6.3CVSS5.8AI score0.00353EPSS
SaveExploits0References1
Cvelist
Cvelist
•added 2026/05/21 8:56 p.m.•49 views

CVE-2026-8204 Concrete CMS 9.5.0 and below is vulnerable to Authorization Bypass in the Calendar Event Frontend Dialog

Concrete CMS 9.5.0 and below is vulnerable to authorization Bypass in the Calendar Event Frontend Dialog which can allow cross-calendar data disclosure. A public calendar block can be used as a pivot point to access private calendar data. The Concrete CMS security team gave this vulnerability a...

6.3CVSS0.00353EPSS
SaveExploits0References1
CVE
CVE
•added 2026/05/21 8:56 p.m.•72 views

CVE-2026-8204

Concrete CMS 9.5.0 and earlier versions are vulnerable to an authorization bypass in the Calendar Event Frontend Dialog, enabling potential cross-calendar data disclosure. A public calendar block can be used as a pivot to access private calendar data. The CVSS v4.0 base score is 6.3 (AV:N/AC:L/AT...

6.3CVSS5.8AI score0.00353EPSS
SaveExploits0References1Affected Software1
OSV
OSV
•added 2026/05/21 8:56 p.m.•14 views

CVE-2026-8204 Concrete CMS 9.5.0 and below is vulnerable to Authorization Bypass in the Calendar Event Frontend Dialog

Concrete CMS 9.5.0 and below is vulnerable to authorization Bypass in the Calendar Event Frontend Dialog which can allow cross-calendar data disclosure. A public calendar block can be used as a pivot point to access private calendar data. The Concrete CMS security team gave this vulnerability a...

6.3CVSS5.9AI score
SaveExploits0References4
Positive Technologies
Positive Technologies
•added 2026/05/21 12:00 a.m.•26 views

PT-2026-42544

Concrete CMS 9.5.0 and below is vulnerable to authorization Bypass in the Calendar Event Frontend Dialog which can allow cross-calendar data disclosure. A public calendar block can be used as a pivot point to access private calendar data. The Concrete CMS security team gave this vulnerability a...

6.3CVSS5.8AI score0.00353EPSS
SaveExploits0References2
Rapid7 Vulnerability Database (full)
Rapid7 Vulnerability Database (full)
•added 2026/05/21 12:00 a.m.•2 views

CVE-2026-8204: Authorization Bypass Through User-Controlled Key

Concrete CMS 9.5.0 and below is vulnerable to authorization Bypass in the Calendar Event Frontend Dialog which can allow cross-calendar data disclosure. A public calendar block can be used as a pivot point to access private calendar data. The Concrete CMS security team gave this vulnerability a...

6.3CVSS5.8AI score0.00353EPSS
SaveExploits0References2
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