What’s Vulnerable › Vulnerabilities

CVE-2024-1246: Concrete CMS in version 9 before 9.2.5 is vulnerable to reflected XSS via the Image URL Import Feature

• Severity: medium (CVSS 4.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-02-09 · updated 2026-06-17
• Weakness: CWE-20

Description

Concrete CMS in version 9 before 9.2.5 is vulnerable to reflected XSS via the Image URL Import Feature due to insufficient validation of administrator provided data. A rogue administrator could inject malicious code when importing images, leading to the execution of the malicious code on the website user’s browser. The Concrete CMS Security team scored this 2 with CVSS v3 vector AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:N. This does not affect Concrete versions prior to version 9.

Affected products

• Concrete CMS: from 9.0.0 before 9.2.5 — fixed in 9.2.5

How to fix

Upgrade to a fixed version: Concrete CMS 9.2.5. Check the vendor advisory for mitigations.

References

• https://documentation.concretecms.org/9-x/developers/introduction/version-history/925-release-notes
• https://www.concretecms.org/about/project-news/security/2024-02-04-security-advisory
• https://documentation.concretecms.org/9-x/developers/introduction/version-history/925-release-notes
• https://www.concretecms.org/about/project-news/security/2024-02-04-security-advisory

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