TI-2024-06857 Aliases CVE-2024-7398 GHSA-x8h2-255q-jg4x

Concrete CMS Stored XSS Vulnerability in Calendar Event Addition Feature

LOW 22CWE-79Published 2024-09-24 · Updated 2025-01-20

Key facts

Attack vector: Network
Privileges required: High
User interaction: Active
Attack complexity: Low
Attack requirements: None
Impact type: Cross-site scripting
Confidentiality · integrity · availability: None · None · None
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

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)

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00487 42nd percentileScored 2026-11-07

Fix Fixed concrete5/concrete5 (Packagist): 9.3.4, 8.5.19

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	concrete5/concrete5 (Packagist)	9.0.0 to before 9.3.4	9.3.4	Patch available	GHSA-x8h2-255q-jg4x
—	concrete5/concrete5 (Packagist)	before 8.5.19	8.5.19	Patch available	GHSA-x8h2-255q-jg4x

concrete5/concrete5 (Packagist) Vendor— Affected 9.0.0 to before 9.3.4 Fixed in 9.3.4 Patch available GHSA-x8h2-255q-jg4x
concrete5/concrete5 (Packagist) Vendor— Affected before 8.5.19 Fixed in 8.5.19 Patch available GHSA-x8h2-255q-jg4x

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:concretecms:concrete_cms::::::::	before 8.5.19; 9.0.0 to before 9.3.3	Vulnerable	Concrete CMS

cpe:2.3:a:concretecms:concrete_cms:*:*:*:*:*:*:*:* Versions before 8.5.19; 9.0.0 to before 9.3.3 Vulnerable ·Concrete CMS

Remediation

Fix · GHSA-x8h2-255q-jg4x concrete5/concrete5 (Packagist) Fixed in 9.3.4 Advisory →
Fix · GHSA-x8h2-255q-jg4x concrete5/concrete5 (Packagist) Fixed in 8.5.19 Advisory →

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2024-09-24
Concrete CMS 8.5.19, 9.3.4
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2024-07687 Concrete CMS Stored XSS in Image Editor Background ColorPriority LOW 24
Show all 2 records →

Timeline

2026-10-02 Threatist record created from CVE-2024-7398
2026-10-03 Alias added: GHSA-x8h2-255q-jg4x

References

Patch 3

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2024-7398

Other 3

TI-2026-23602 ConcreteCMS v9.4.7 contains a Denial of Service (DoS) vulnerability in the File Manager… CVSS 3.1MEDIUM 6.5
TI-2023-23992 A Cross Site Scripting (XSS) vulnerability in Concrete CMS from versions 9.2.0 to 9.2.2… CVSS 3.1MEDIUM 5.4
TI-2023-26495 Concrete CMS before 8.5.13 and 9.x before 9.2.2 allows unauthorized access because… CVSS 3.1CRITICAL 9.8
TI-2026-14907 Missing authorization in Concrete CMS CVSS 4.0HIGH 8.7
TI-2022-06200 Cleartext transmission of sensitive information in https://github.com/concrete5/concrete5 CVSS 3.1CRITICAL 9.8
TI-2021-17294 An issue was discovered in Concrete CMS through 8.5.5. CVSS 3.1CRITICAL 9.8

See all 197 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences