What’s Vulnerable › Vulnerabilities

CVE-2025-0660: Stored XSS in Folder Function by Rogue Admin

• Severity: medium (CVSS 4.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-03-10 · updated 2026-06-17
• Weakness: CWE-20

Description

Concrete CMS versions 9.0.0 through 9.3.9 are affected by a stored XSS in Folder Function.The "Add Folder" functionality lacks input sanitization, allowing a rogue admin to inject XSS payloads as folder names.  The Concrete CMS security team gave this vulnerability a CVSS 4.0 Score of 4.8 with vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N. Versions below 9 are not affected. Thanks, Alfin Joseph for reporting.

Affected products

• Concrete CMS: from 9.0 before 9.4.0 — fixed in 9.4.0

How to fix

Upgrade to a fixed version: Concrete CMS 9.4.0. Check the vendor advisory for mitigations.

References

• https://documentation.concretecms.org/9-x/developers/introduction/version-history/940-release-notes
• https://github.com/concretecms/bedrock/pull/370
• https://github.com/concretecms/concretecms/pull/12454

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