CVE-2026-0566
Published: 02 January 2026
Summary
CVE-2026-0566 is a medium-severity Improper Access Control (CWE-284) vulnerability in Code-Projects Content Management System. Its CVSS base score is 5.1 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 22.0th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 AC-3 (Access Enforcement) and SI-10 (Information Input Validation).
Deeper analysis
CVE-2026-0566 is a security vulnerability in code-projects Content Management System version 1.0, affecting an unknown function within the file /admin/edit_posts.php. The issue enables unrestricted file upload through manipulation of the "image" argument, as identified by CWEs-284 (Improper Access Control) and CWE-434 (Unrestricted Upload of File with Dangerous Type). It carries a CVSS v3.1 base score of 4.7 (AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L) and was published on 2026-01-02.
The vulnerability can be exploited remotely by an attacker with high privileges over the network with low attack complexity and no user interaction required. Successful exploitation allows limited impacts on confidentiality, integrity, and availability, potentially enabling malicious file uploads that could lead to further compromise depending on the uploaded content.
Advisories and additional details are documented on VulDB (ctiid.339378, id.339378, submit.729228), a GitHub issue at github.com/Limingqian123/CVE/issues/13, and code-projects.org. The exploit has been publicly disclosed and may be used by attackers.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-0037
Vulnerability details
A security vulnerability has been detected in code-projects Content Management System 1.0. Impacted is an unknown function of the file /admin/edit_posts.php. The manipulation of the argument image leads to unrestricted upload. The attack is possible to be carried out remotely.…
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The exploit has been disclosed publicly and may be used.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Unrestricted file upload in a web CMS directly enables web shell deployment (T1100/T1505.003) via exploitation of a public-facing application (T1190).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly enforces access restrictions on the image argument in edit_posts.php to block unauthorized or dangerous file uploads.
Requires validation of uploaded file content and type to reject dangerous files before they are stored or executed.
Limits the upload-related privileges granted even to high-privilege admin accounts, reducing the impact of the missing restriction.