CVE-2026-10271: Student Management System RCE Flaw

CVE-2026-10271 Overview

CVE-2026-10271 is an execution-after-redirect vulnerability in the a4m4 Student-Management-System PHP application, affecting commits up to f0c5f6842c5e8c431ff02b5260a565ca844df3a0. The flaw resides in an unknown function under the admin/ directory, where manipulation of the uid argument allows attackers to trigger unintended code execution after an HTTP redirect is issued. The issue maps to [CWE-698: Execution After Redirect (EAR)]. Multiple admin endpoints are affected. Because the project uses a rolling release model, no fixed version is published. The exploit has been disclosed publicly, and the project maintainers have not yet responded to the issue report.

Critical Impact
Remote attackers can interact with admin functionality and access protected logic after a redirect is supposed to terminate the request, exposing low-impact confidentiality, integrity, and availability conditions.

Affected Products

a4m4 Student-Management-System (PHP) up to commit f0c5f6842c5e8c431ff02b5260a565ca844df3a0
Admin Endpoint component under the admin/ directory
Multiple endpoints within the same component

Discovery Timeline

2026-06-01 - CVE-2026-10271 published to NVD
2026-06-01 - Last updated in NVD database

Technical Details for CVE-2026-10271

Vulnerability Analysis

The vulnerability is an Execution After Redirect (EAR) flaw [CWE-698] in the admin interface of the Student-Management-System project. In PHP applications, calling header("Location: ...") does not stop script execution unless followed by an explicit exit or die statement. When developers omit this termination, the redirected request continues to process logic intended only for authenticated or authorized users. An attacker can manipulate the uid parameter to reach sensitive admin code paths after the redirect, bypassing access checks that rely solely on the redirect to enforce control flow. The exploit requires user interaction and can be initiated remotely. Public disclosure has occurred via the project's GitHub issue tracker and VulDB.

Root Cause

The root cause is missing termination after authentication or access-control redirects in admin scripts. Server-side code continues to evaluate request parameters such as uid and execute privileged logic even though the HTTP response indicates a redirect. This design defect mixes redirect-based access control with logic that should be gated by server-side authorization checks.

Attack Vector

An unauthenticated remote attacker sends a crafted HTTP request to an affected endpoint under admin/, supplying a chosen value for the uid parameter. Although the application issues a redirect response, the request continues to execute the underlying admin function. The attacker reads the response body or observes side effects of the executed code, gaining limited access to data or actions that should require authentication.

No verified proof-of-concept code is available. See the GitHub Issue Tracker Entry and the VulDB Vulnerability Details for additional technical context.

Detection Methods for CVE-2026-10271

Indicators of Compromise

Unauthenticated HTTP requests to URIs under admin/ containing a uid query or POST parameter.
HTTP responses that include both a Location: redirect header and a non-empty response body containing admin content.
Web server access logs showing successful (200) admin responses on endpoints that should produce 302 redirects for unauthenticated users.

Detection Strategies

Review web server and application logs for requests to admin/ endpoints lacking valid session cookies but receiving body content beyond a redirect notice.
Perform code review of all admin PHP scripts to confirm that every header("Location: ...") call is immediately followed by exit; or die();.
Run automated security scanners configured to detect Execution After Redirect (EAR) patterns by following redirects and inspecting response bodies for sensitive content.

Monitoring Recommendations

Alert on anomalous parameter values supplied to the uid field on admin endpoints, especially from unauthenticated sessions.
Monitor for elevated rates of 302 responses paired with large response bodies on the affected web application.
Correlate web access logs with authentication events to identify successful admin operations performed without a corresponding login.

How to Mitigate CVE-2026-10271

Immediate Actions Required

Restrict access to the admin/ directory at the web server layer using IP allow-lists or HTTP authentication until the application is patched.
Audit all admin PHP scripts and add exit; after every redirect issued for access-control purposes.
Disable or take offline any internet-exposed instances of the affected Student-Management-System until remediation is verified.

Patch Information

No official patch has been released. The project uses a rolling release model and, according to the disclosure, the maintainers have not responded to the GitHub issue report. Operators should apply a local code fix by ensuring every redirect in the admin/ directory terminates execution and by enforcing server-side authorization checks on the uid parameter before any sensitive logic runs.

Workarounds

Place the application behind a reverse proxy or WAF rule that blocks requests to admin/ lacking a valid session cookie.
Implement server-side authorization middleware that validates the session before any admin script processes the uid parameter.
Apply a local source patch that inserts exit; immediately after each header("Location: ...") call in admin scripts.

bash

# Configuration example: restrict admin directory via Apache .htaccess
<Directory "/var/www/html/admin">
    Require ip 10.0.0.0/8
    AuthType Basic
    AuthName "Restricted Admin"
    AuthUserFile /etc/apache2/.htpasswd
    Require valid-user
</Directory>