CVE-2026-67960: PbootCMS RCE Vulnerability

CVE-2026-67960 Overview

CVE-2026-67960 is a code injection vulnerability in PbootCMS v3.2.15, a PHP-based content management system. Attackers can execute arbitrary code by abusing flaws in the MemberController.php, UserController.php, CommentController.php, ContentController.php, and helper.php components. The issue is classified under CWE-94: Improper Control of Generation of Code. Exploitation requires no authentication, no user interaction, and can be performed remotely over the network.

Critical Impact
Unauthenticated remote attackers can achieve arbitrary code execution on servers running PbootCMS v3.2.15, leading to full compromise of confidentiality, integrity, and availability.

Affected Products

PbootCMS v3.2.15
Deployments exposing MemberController.php, UserController.php, CommentController.php, or ContentController.php endpoints
Web applications relying on the vulnerable helper.php component

Discovery Timeline

2026-08-17 - CVE-2026-67960 published to the National Vulnerability Database (NVD)
2026-08-18 - Last updated in NVD database

Technical Details for CVE-2026-67960

Vulnerability Analysis

The vulnerability resides in multiple controller files and the shared helper.php module within PbootCMS v3.2.15. Attacker-supplied input reaches code-generation or evaluation logic without sufficient validation. This lets an unauthenticated remote attacker inject and execute arbitrary code in the context of the PHP process. Because the flaw spans several controllers responsible for member, user, comment, and content workflows, the attack surface is wide across typical PbootCMS deployments.

Root Cause

The root cause is improper control of code generation [CWE-94]. Input passed through the affected controllers is incorporated into constructs that are subsequently interpreted as code by the PHP runtime. The helper.php component contributes shared utility logic that fails to sanitize or constrain values used in these constructs. As a result, untrusted request parameters can alter application execution flow at runtime.

Attack Vector

Exploitation occurs over the network against the CMS HTTP endpoints exposed by the affected controllers. No credentials or user interaction are required. An attacker crafts requests to endpoints handled by MemberController.php, UserController.php, CommentController.php, or ContentController.php, injecting payloads that traverse into helper routines and reach code interpretation paths. Successful exploitation yields arbitrary code execution as the web server user, enabling webshell installation, data theft, or lateral movement.

No verified public proof-of-concept code is available at this time. See the GitHub Issue Discussion on CVE and the GitHub Document on PbootCMS Vulnerability for reference details.

Detection Methods for CVE-2026-67960

Indicators of Compromise

Unexpected PHP files written under the PbootCMS web root, particularly in apps/ or upload directories
Anomalous HTTP POST requests targeting endpoints tied to MemberController, UserController, CommentController, or ContentController
Outbound network connections initiated by the PHP process to unfamiliar hosts following inbound requests to the affected controllers
New scheduled tasks, cron entries, or system users created on the CMS host

Detection Strategies

Inspect web server access logs for requests containing PHP tags, backticks, or eval-like tokens against affected controller routes
Monitor process creation on the CMS host for shell interpreters (sh, bash, cmd.exe) spawned by the PHP-FPM or web server process
Deploy Web Application Firewall (WAF) rules that block code-injection payloads targeting PbootCMS controller parameters
Use file integrity monitoring on PbootCMS installation directories to catch unauthorized modifications to controllers and helper.php

Monitoring Recommendations

Centralize web server, PHP error, and system audit logs and alert on child-process activity from the web server account
Baseline outbound network activity from PbootCMS servers and alert on deviations, especially connections to known malicious infrastructure
Track authentication events and administrative changes within PbootCMS to identify post-exploitation persistence

How to Mitigate CVE-2026-67960

Immediate Actions Required

Restrict network access to PbootCMS administrative and comment endpoints until a fix is applied
Place the application behind a WAF configured to block code-injection patterns aimed at PHP CMS platforms
Audit the CMS host for unauthorized files, scheduled tasks, and outbound connections created since exposure
Rotate credentials, API keys, and database secrets stored on or accessible from the affected server

Patch Information

No vendor advisory or official patch is referenced in the available CVE data. Monitor the GitHub Issue Discussion on CVE and the PbootCMS project channels for fix releases. Until an official patch is provided, treat any PbootCMS v3.2.15 instance as vulnerable.

Workarounds

Take affected PbootCMS v3.2.15 deployments offline or isolate them within a segmented network zone
Disable public access to member, user, comment, and content submission endpoints where feasible
Enforce strict input validation and disable dangerous PHP functions such as eval, assert, and system in php.ini via disable_functions
Run the PHP process under a least-privilege account with restricted file system write permissions

bash

# Configuration example: harden PHP runtime in php.ini
disable_functions = eval,assert,exec,system,passthru,shell_exec,popen,proc_open,pcntl_exec
allow_url_include = Off
allow_url_fopen = Off
open_basedir = /var/www/pbootcms:/tmp