CVE-2026-39387
BoidCMS: Local File Inclusion (LFI) leads to Remote Code Execution (RCE) via tpl parameter
Description
BoidCMS is an open-source, PHP-based flat-file CMS for building simple websites and blogs, using JSON as its database. Versions prior to 2.1.3 are vulnerable to a critical Local File Inclusion (LFI) attack via the tpl parameter, which can lead to Remote Code Execution (RCE).The application fails to sanitize the tpl (template) parameter during page creation and updates. This parameter is passed directly to a require_once() statement without path validation. An authenticated administrator can exploit this by injecting path traversal sequences (../) into the tpl value to escape the intended theme directory and include arbitrary files — specifically, files from the server's media/ directory. When combined with the file upload functionality, this becomes a full RCE chain: an attacker can first upload a file with embedded PHP code (e.g., disguised as image data), then use the path traversal vulnerability to include that file via require_once(), executing the embedded code with web server privileges. This issue has been fixed in version 2.1.3.
INFO
Published Date :
April 14, 2026, 11:16 p.m.
Last Modified :
April 23, 2026, 5:35 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update BoidCMS to version 2.1.3.
- Apply security patches if available.
- Validate all user inputs.
- Restrict file access permissions.
Public PoC/Exploit Available at Github
CVE-2026-39387 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-39387.
| URL | Resource |
|---|---|
| https://github.com/BoidCMS/BoidCMS/releases/tag/v2.1.3 | Product Release Notes |
| https://github.com/BoidCMS/BoidCMS/security/advisories/GHSA-45xp-xw54-6cv6 | Exploit Mitigation Vendor Advisory |
| https://github.com/BoidCMS/BoidCMS/security/advisories/GHSA-45xp-xw54-6cv6 | Exploit Mitigation Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-39387 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-39387
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
BoidCMS <= 2.1.2 RCE Exploit
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-39387 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-39387 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Apr. 23, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:boidcms:boidcms:*:*:*:*:*:*:*:* versions up to (excluding) 2.1.3 Added Reference Type GitHub, Inc.: https://github.com/BoidCMS/BoidCMS/releases/tag/v2.1.3 Types: Product, Release Notes Added Reference Type CISA-ADP: https://github.com/BoidCMS/BoidCMS/security/advisories/GHSA-45xp-xw54-6cv6 Types: Exploit, Mitigation, Vendor Advisory Added Reference Type GitHub, Inc.: https://github.com/BoidCMS/BoidCMS/security/advisories/GHSA-45xp-xw54-6cv6 Types: Exploit, Mitigation, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Apr. 15, 2026
Action Type Old Value New Value Added Reference https://github.com/BoidCMS/BoidCMS/security/advisories/GHSA-45xp-xw54-6cv6 -
New CVE Received by [email protected]
Apr. 14, 2026
Action Type Old Value New Value Added Description BoidCMS is an open-source, PHP-based flat-file CMS for building simple websites and blogs, using JSON as its database. Versions prior to 2.1.3 are vulnerable to a critical Local File Inclusion (LFI) attack via the tpl parameter, which can lead to Remote Code Execution (RCE).The application fails to sanitize the tpl (template) parameter during page creation and updates. This parameter is passed directly to a require_once() statement without path validation. An authenticated administrator can exploit this by injecting path traversal sequences (../) into the tpl value to escape the intended theme directory and include arbitrary files — specifically, files from the server's media/ directory. When combined with the file upload functionality, this becomes a full RCE chain: an attacker can first upload a file with embedded PHP code (e.g., disguised as image data), then use the path traversal vulnerability to include that file via require_once(), executing the embedded code with web server privileges. This issue has been fixed in version 2.1.3. Added CVSS V3.1 AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-98 Added Reference https://github.com/BoidCMS/BoidCMS/releases/tag/v2.1.3 Added Reference https://github.com/BoidCMS/BoidCMS/security/advisories/GHSA-45xp-xw54-6cv6