CVE-2021-40108

HIGH

Concrete CMS < 8.5.6 - Cross-Site Request Forgery via Calendar Event Save Endpoint

Title source: llm
STIX 2.1

Description

An issue was discovered in Concrete CMS through 8.5.5. The Calendar is vulnerable to CSRF. ccm_token is not verified on the ccm/calendar/dialogs/event/add/save endpoint.

References (2)

Core 2
Core References
Permissions Required x_refsource_misc
https://hackerone.com/reports/1102018

Scores

CVSS v3 8.8
EPSS 0.0048
EPSS Percentile 38.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Details

CWE
CWE-352
Status published
Products (1)
concretecms/concrete_cms < 8.5.6
Published Sep 27, 2021
Tracked Since Feb 18, 2026