CVE-2026-2133
Published: 08 February 2026
Summary
CVE-2026-2133 is a medium-severity Improper Access Control (CWE-284) vulnerability in Fabian Online Music Site. Its CVSS base score is 6.9 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 33.3th 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 SI-10 (Information Input Validation) and SI-3 (Malicious Code Protection).
Deeper analysis
CVE-2026-2133 is an unrestricted file upload vulnerability in code-projects Online Music Site 1.0. The issue affects an unknown function within the file /Administrator/PHP/AdminUpdateCategory.php, where manipulation of the txtimage argument enables the upload of arbitrary files. The vulnerability carries a CVSS v3.1 base score of 7.3 (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L) and is associated with CWE-284 (Improper Access Control) and CWE-434 (Unrestricted Upload of File with Dangerous Type). It was published on 2026-02-08.
Remote attackers can exploit this vulnerability without authentication or user interaction, requiring only low complexity over the network. Successful exploitation allows limited impacts on confidentiality, integrity, and availability, potentially enabling attackers to upload malicious files that could lead to further compromise depending on server configuration.
Advisories and details are available via references including the project site at https://code-projects.org/, a GitHub issue at https://github.com/Volije/cve2/issues/1, and VulDB entries at https://vuldb.com/?ctiid.344768, https://vuldb.com/?id.344768, and https://vuldb.com/?submit.747213. An exploit is publicly available and could be used for attacks.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-5815
Vulnerability details
A weakness has been identified in code-projects Online Music Site 1.0. Impacted is an unknown function of the file /Administrator/PHP/AdminUpdateCategory.php. This manipulation of the argument txtimage causes unrestricted upload. The attack is possible to be carried out remotely. The exploit…
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has been made available to the public and could be used for attacks.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Unrestricted file upload in a public-facing web app directly enables remote exploitation (T1190) and facilitates web shell deployment for execution/persistence (T1100).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Enforces validation of the txtimage file argument in AdminUpdateCategory.php to block arbitrary or dangerous file types before upload succeeds.
Requires malicious-code scanning and blocking of uploaded files, directly mitigating the unrestricted upload weakness that allows remote arbitrary-file placement.
Enforces access-control checks on the /Administrator/PHP/AdminUpdateCategory.php endpoint so that unauthenticated remote users cannot perform the file-upload operation.