Description

Concrete CMS versions 9 through 9.3.3 and versions below 8.5.19 are vulnerable to stored XSS in the calendar event addition feature because the calendar event name was not sanitized on output. Users or groups with permission to create event calendars can embed scripts, and users or groups with permission to modify event calendars can execute scripts. The Concrete CMS Security Team gave this vulnerability a CVSS v4 score of 4.6 with vector CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N Thank you, Yusuke Uchida for reporting. CNA updated this risk rank on 20 Jan 2025 by lowering the AC based on CVSS 4.0 documentation that access privileges should not be considered for AC)

Classification

CVE ID: CVE-2024-7398

CVSS Base Severity: MEDIUM

CVSS Base Score: 4.6

Affected Products

Vendor: Concrete CMS

Product: Concrete CMS

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.05% (probability of being exploited)

EPSS Percentile: 23.58% (scored less or equal to compared to others)

EPSS Date: 2025-02-18 (when was this score calculated)

References

https://github.com/concretecms/concretecms/commit/7c8ed0d1d9db0d7f6df7fa066e0858ea618451a5
https://github.com/concretecms/concretecms/pull/12183
https://github.com/concretecms/concretecms/pull/12184
https://documentation.concretecms.org/9-x/developers/introduction/version-history/934-release-notes
https://documentation.concretecms.org/developers/introduction/version-history/8519-release-notes

Timeline