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Github Security Blog
Github Security Blog
added 2026/05/21 9:30 p.m.13 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 score0.00211EPSS
SaveExploits0References3Affected Software1
OSV
OSV
added 2026/05/21 9:30 p.m.13 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 score0.00211EPSS
SaveExploits0References3
Vulnrichment
Vulnrichment
added 2026/05/21 9:29 p.m.12 views

CVE-2026-8414 Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/dialog/event/duplicate

Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery CSRF at concrete/controllers/dialog/event/duplicate. 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 Yonatan...

2.3CVSS5.8AI score0.0013EPSS
SaveExploits0References1
ATTACKERKB
ATTACKERKB
added 2026/05/21 9:29 p.m.9 views

CVE-2026-8414

Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery CSRF at concrete/controllers/dialog/event/duplicate. 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 Yonatan...

2.3CVSS5.8AI score0.0013EPSS
SaveExploits0References2Affected Software1
CVE
CVE
added 2026/05/21 9:29 p.m.68 views

CVE-2026-8414

Concrete CMS 9.x before 9.5.0 is affected by a CSRF vulnerability in the endpoint concrete/controllers/dialog/event/duplicate. Technical details from PT-2026-42570 indicate versions 9.0.0 through 9.4.x are vulnerable, with exploitation via the affected endpoint. The recommended fix is to upgrade ...

8.8CVSS5.8AI score0.0013EPSS
SaveExploits0References1Affected Software1
Cvelist
Cvelist
added 2026/05/21 9:29 p.m.45 views

CVE-2026-8414 Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/dialog/event/duplicate

Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery CSRF at concrete/controllers/dialog/event/duplicate. 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 Yonatan...

2.3CVSS0.0013EPSS
SaveExploits0References1
OSV
OSV
added 2026/05/21 9:29 p.m.9 views

CVE-2026-8414 Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/dialog/event/duplicate

Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery CSRF at concrete/controllers/dialog/event/duplicate. 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 Yonatan...

2.3CVSS5.9AI score
SaveExploits0References4
Cvelist
Cvelist
added 2026/05/21 8:57 p.m.54 views

CVE-2026-8205 Concrete CMS 9.5.0 and below is vulnerable to authorization bypass in Calendar Block since action_get_events does not check canView on the calendar

Concrete CMS 9.5.0 and below is vulnerable to authorization bypass in the Calendar Block since actiongetevents 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...

6.3CVSS0.00211EPSS
SaveExploits0References1
Vulnrichment
Vulnrichment
added 2026/05/21 8:57 p.m.8 views

CVE-2026-8205 Concrete CMS 9.5.0 and below is vulnerable to authorization bypass in Calendar Block since action_get_events does not check canView on the calendar

Concrete CMS 9.5.0 and below is vulnerable to authorization bypass in the Calendar Block since actiongetevents 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...

6.3CVSS5.8AI score0.00211EPSS
SaveExploits0References1
ATTACKERKB
ATTACKERKB
added 2026/05/21 8:57 p.m.10 views

CVE-2026-8205

Concrete CMS 9.5.0 and below is vulnerable to authorization bypass in the Calendar Block since actiongetevents 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...

6.3CVSS5.8AI score0.00211EPSS
SaveExploits0References2Affected Software1
EUVD
EUVD
added 2026/05/21 8:57 p.m.16 views

EUVD-2026-31351

Concrete CMS 9.5.0 and below is vulnerable to authorization bypass in the Calendar Block since actiongetevents 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...

6.3CVSS5.8AI score0.00211EPSS
SaveExploits0References1
CVE
CVE
added 2026/05/21 8:56 p.m.61 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 score0.00211EPSS
SaveExploits0References1Affected Software1
Circl
Circl
added 2026/05/21 7:12 p.m.14 views

CVE-2026-48239

creationtimestamp| type| source ---|---|--- 2026-05-21 19:12:58+00:00| seen| https://bsky.app/profile/cve.skyfleet.blue/post/3mmf4tno6jl2h...

7.1CVSS5.8AI score0.00214EPSS
SaveExploits0References1
Circl
Circl
added 2026/05/21 6:57 p.m.15 views

CVE-2026-48244

creationtimestamp| type| source ---|---|--- 2026-05-21 18:57:36+00:00| seen| https://bsky.app/profile/cve.skyfleet.blue/post/3mmf3y6tqux2e...

6.9CVSS5.8AI score0.00224EPSS
SaveExploits0References1
Circl
Circl
added 2026/05/21 4:17 p.m.16 views

CVE-2026-43497

creationtimestamp| type| source ---|---|--- 2026-05-21 16:17:01+00:00| seen| https://bsky.app/profile/cve.skyfleet.blue/post/3mmesyzrc762t 2026-07-06 06:15:06+00:00| seen| https://www.hkcert.org/security-bulletin/debian-linux-kernel-multiple-vulnerabilities20260706 2026-08-03 07:28:33+00:00| seen...

7.3CVSS5.8AI score0.00113EPSS
SaveExploits0References3
Circl
Circl
added 2026/05/21 12:56 p.m.15 views

CVE-2026-43494

creationtimestamp| type| source ---|---|--- 2026-05-21 12:56:06+00:00| seen| https://bsky.app/profile/cve.skyfleet.blue/post/3mmehrqrwq72k 2026-05-22 08:21:59+00:00| seen| https://bsky.app/profile/linux.activitypub.awakari.com.ap.brid.gy/post/3mmgiweecrly2 2026-05-25 08:00:04+00:00| seen|...

7.8CVSS6.3AI score0.00299EPSS
SaveExploits3References11
Circl
Circl
added 2026/05/21 12:44 p.m.13 views

CVE-2026-99999

creationtimestamp| type| source ---|---|--- 2026-05-21 12:44:45+00:00| seen| https://bsky.app/profile/gonzokata.bsky.social/post/3mmeh53pwfk22 2026-06-19 12:04:49+00:00| seen| https://gist.github.com/shweta-tripathi-1519/c957e66dd8f0e7892e135a18982c486a...

5.8AI score
SaveExploits0References2
Circl
Circl
added 2026/05/21 10:43 a.m.32 views

CVE-2026-44073

creationtimestamp| type| source ---|---|--- 2026-05-21 10:43:50+00:00| seen| https://bsky.app/profile/cve.skyfleet.blue/post/3mmeafaskb32i 2026-06-01 00:01:29+00:00| seen| https://bsky.app/profile/slackers.it/post/3mn6rmqdab727...

5CVSS5.8AI score0.00277EPSS
SaveExploits0References2
Circl
Circl
added 2026/05/21 9:00 a.m.30 views

CVE-2026-38765

creationtimestamp| type| source ---|---|--- 2026-05-21 09:00:04+00:00| seen| Telegram/vpOabQVvb76izlIWt2pzp7PU5zl-D7jeeGQcHuuxEyFlkWM...

7.8CVSS5.8AI score0.00171EPSS
SaveExploits0
Circl
Circl
added 2026/05/21 7:32 a.m.25 views

CVE-2026-6452

creationtimestamp| type| source ---|---|--- 2026-05-21 07:32:06+00:00| seen| https://bsky.app/profile/atomicedge.bsky.social/post/3mmdvofn2xr2s...

4.3CVSS5.8AI score0.00158EPSS
SaveExploits0References1
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