.webp "CVE-2026-2133 Alert: Online Music Site Vulnerability")
This flaw allows remote attackers to upload arbitrary files via an unrestricted upload mechanism in the admin interface, potentially leading to server compromise.
The issue carries a CVSS v3.1 base score of 7.3 (High), with proof-of-concept exploits already circulating publicly.
The vulnerability resides in the file /Administrator/PHP/AdminUpdateCategory.php, specifically in how it handles the txtimage parameter.
Developers of this PHP-based music streaming platform intended the endpoint for updating category images in the admin panel.
Instead, it fails to enforce proper file validation, size checks, and execution restrictions, allowing attackers to upload malicious files, such as PHP webshells, directly to accessible web directories.
Attackers can trigger this remotely without authentication (AV:N/AC:L/PR: N), affecting confidentiality, integrity, and availability to a low degree (C:L/I: L/A:L).
The proof-of-concept (E:P) is available, and no official vendor remediation (RL:X) has been released yet. Recent analysis flags recent IOCs, including POST requests to the vulnerable endpoint, followed by new file drops in upload/webroot paths.
Technical Breakdown
At its core, CVE-2026-2133 stems from CWE-434: Unrestricted Upload of File with Dangerous Type. The AdminUpdateCategory.php script processes txtimage as a file upload during category edits, but skips essential sanitization. Here’s how a typical exploit unfolds:
- An unauthenticated attacker sends a crafted HTTP POST to /Administrator/PHP/AdminUpdateCategory.php.
- The payload includes a txtimage field with a malicious file, e.g., a PHP shell disguised as an image (like shell.php with <?php system($_GET[‘cmd’]); ?>).
- The server saves it without MIME-type verification, extension blocklisting, or content scanning straight to a web-accessible directory like /uploads/ or /webroot/.
- The attacker then accesses the shell via a direct URL, executing arbitrary commands.
This analysis reveals that VulDB’s entry details the vector as CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R. The low privileges required (none) and network accessibility make it a prime target for automated scanners.
| Aspect | Details |
|---|---|
| CVE ID | CVE-2026-2133 |
| Severity | High (CVSS 7.3) |
| Affected Product | Code-Projects Online Music Site |
| Versions | 1.0 |
| Component | /Administrator/PHP/AdminUpdateCategory.php (txtimage parameter) |
| CWE | CWE-434 (Unrestricted Upload of File with Dangerous Type) |
| Attack Vector | Network (AV:N), Low complexity (AC:L), No privileges (PR:N), No UI (UI:N), Unchanged scope (S:U) |
| Impact | Low Confidentiality (C:L), Low Integrity (I:L), Low Availability (A:L) |
| Exploit Maturity | Proof-of-concept available (E:P) |
| Remediation Level | None official (RL:X) |
| Published/Updated | 2026-02-08T03:32:07.309Z |
Risk Analysis and Attack Paths
Why does this matter? In a landscape of millions of misconfigured web apps, unrestricted uploads remain a top web app killer, think Equifax or countless WordPress breaches. Attackers prioritize these for RCE because they bypass auth entirely.
Most Likely Attack Path:
- Recon: Shodan/Nmap scans for /Administrator/ endpoints on PHP servers.
- Exploit: curl -F “txtimage=@shell.php” http://target/Administrator/PHP/AdminUpdateCategory.php.
- Post-Exploitation: Access shell.php?cmd=id for shell, escalate via local privs, pivot to database (music site likely stores user creds).
Who’s Most Exposed?
According to Redpacketsecurity, small businesses hobbyist sites, or devs deploying Code-Projects templates on shared hosting (e.g., Apache/Nginx with PHP-FPM). Legacy installs from 2020-2025 are prime targets, especially if exposed on ports 80/443 without a WAF.
- Logs: POSTs to /Administrator/PHP/AdminUpdateCategory.php with txtimage multipart/form-data, followed by 2xx responses and new files in /uploads/webroot/.
- File System: Suspicious PHP/ASP files in image dirs (e.g., evil.jpg.php), MIME mismatches (image/jpeg claiming application/x-php).
- Network: Spikes in admin traffic, rapid category updates, or failed auths pre-exploit.
- Behavioral: Tools like Falco or OSSEC for anomalous file creation; YARA rules for webshell signatures (e.g., system($_GET patterns).
SIEM queries: Hunt for file. Create events near admin endpoints or Content-Type: image/* with PHP extensions.
Mitigation and Prioritization
Immediate Controls: Block uploads in AdminUpdateCategory.php, add move_uploaded_file() checks for ext (jpg/png only), magic byte validation (IMagick/GD), and store outside webroot (e.g., /var/uploads/). Rename to .jpg and turn off PHP exec via .htaccess: php_flag engine off.
WAF Rules: ModSecurity/Cloudflare: Block txtimage POSTs or regex for <\?php in payloads.
Upgrade Path: Fork and harden, or migrate to a secure alternative such as a Laravel-based CMS. Test in staging; scan with Nuclei/Burp for similar flaws.
Hunt for Compromise: Grep webshells, review access logs 30 days back, rotate creds/DB.
Prioritize: if you’re running v1.0, expose and expect mass scanning soon after disclosure. Broader lesson: Audit all admin uploads in PHP apps; unrestricted ones are low-hanging fruit.
Site : cybersecuritypath.com
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