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Vulnerability · Published Sep 24, 2024 · Assigned by ConcreteCMS

CVE-2024-7398Concrete CMS Stored XSS Vulnerability in Calendar Event Addition Feature

Medium 4.6

In plain English

A medium-severity cross-site scripting in Concrete CMS from Concrete CMS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)4.6Medium
Exploit odds (30 days)0.5%top 57.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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)

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Packagistconcrete5/concrete59.3.4GHSA-x8h2-255q-jg4x
Packagistconcrete5/concrete58.5.19GHSA-x8h2-255q-jg4x

Affected products (as reported)

VendorProductVersions
Concrete CMS Concrete CMS 9.0.0 – before 9.3.45.0.0 – before 8.5.19

Weakness: CWE-79 · 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

References