What’s Vulnerable › Vulnerabilities

CVE-2022-24789: Deserialization of untrusted data in C1 CMS.

• Severity: high (CVSS 7.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-03-28 · updated 2026-06-17
• Weakness: CWE-918

Description

C1 CMS is an open-source, .NET based Content Management System (CMS). Versions prior to 6.12 allow an authenticated user to exploit Server Side Request Forgery (SSRF) by causing the server to make arbitrary GET requests to other servers in the local network or on localhost. The attacker may also truncate arbitrary files to zero size (effectively delete them) leading to denial of service (DoS) or altering application logic. The authenticated user may unknowingly perform the actions by visiting a specially crafted site. Patched in C1 CMS v6.12, no known workarounds exist.

Affected products

• Orckestra C1-CMS-Foundation: before 6.12 — fixed in 6.12

How to fix

Upgrade to a fixed version: Orckestra C1-CMS-Foundation 6.12. Check the vendor advisory for mitigations.

References

• https://github.com/Orckestra/C1-CMS-Foundation/releases/tag/v6.12
• https://github.com/Orckestra/C1-CMS-Foundation/security/advisories/GHSA-j9c2-gr6m-pp45
• https://github.com/Orckestra/C1-CMS-Foundation/releases/tag/v6.12
• https://github.com/Orckestra/C1-CMS-Foundation/security/advisories/GHSA-j9c2-gr6m-pp45

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