External risk intelligence

TaoCMS Code Injection Via .htaccess File Editing

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2022-25578

TaoCMS is a content management system designed to be hosted on web servers to serve public-facing websites. As a web application, its administrative interfaces and core files are commonly accessible via the internet in standard deployment patterns.

Code Injection

Taogogo Taocms

3.0.2

Halo Surface Signal: 4 out of 5 — likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

A critical vulnerability has been identified in TaoCMS, a web content management system, that allows for code injection through the editing of a configuration file. This issue could potentially enable unauthorized execution of code on affected systems.

Code injection via configuration file editing.
Confirms relevance and exposure to TaoCMS.
Assess impact on TaoCMS deployments.

Attack Path

How an attacker could exploit the issue

An attacker could exploit this vulnerability by manipulating the `.htaccess` file within TaoCMS. This file, when edited maliciously, can lead to code injection, potentially allowing the attacker to execute arbitrary code on the server.

Unauthenticated access to the system.
Arbitrary editing of the `.htaccess` file.
Server-side code execution.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow an unauthenticated attacker to inject and execute arbitrary code by editing the `.htaccess` file. This could lead to a compromise of the affected server.

Server files and code execution.
Code injection via `.htaccess` editing.
Complete server compromise.

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability in TaoCMS impacts application owners responsible for the content management system, as well as infrastructure or platform teams managing the underlying web servers. The immediate first step is to identify all TaoCMS installations, determine their exposure to the internet, confirm their criticality to business operations, and locate the accountable owner to plan remediation based on the assessed risk.

Application and platform teams own remediation.
Verify internet-facing TaoCMS installations first.
Plan risk-based remediation with owners.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

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Frequently asked questions

What is taocms?

TaoCMS is a lightweight content management system (CMS) built to run on web servers. It helps users organize, manage, and publish website content. Because it is designed to serve public-facing web pages, it typically lives on a server accessible to anyone on the internet, which is a key factor in how this software is deployed and maintained.

What does code injection mean for CVE-2022-25578?

This vulnerability falls under the weakness class of Improper Control of Generation of Code, or CWE-94. In plain terms, it means the application does not properly validate or restrict commands, allowing an attacker to insert their own malicious instructions into the system. In this specific case, it involves manipulating the .htaccess configuration file to force the server to run unauthorized code.

How does an attacker trigger this vulnerability?

An attacker triggers this by gaining unauthorized access to edit the .htaccess file within the TaoCMS installation. The vulnerability does not require complex preconditions; it stems from the ability to modify this specific server configuration file directly. Simply visiting the site or performing standard administrative tasks does not trigger the flaw; it requires the deliberate act of injecting code into that file.

Do I need to worry if my TaoCMS instance is internal?

Halo Surface Signal indicates that TaoCMS is commonly deployed as a public-facing web application. If your instance is truly internal and blocked from the public internet, it is at lower risk of external attack. However, any server-side vulnerability is significant, as it could still be leveraged by someone already inside your network or if the server's reach is expanded later.

Is there a first step to take for TaoCMS installations?

The priority is to locate every instance of TaoCMS running in your environment. Once identified, audit these installations to see which are accessible from the internet and confirm who is responsible for managing them. Understanding your total footprint allows you to coordinate with the right teams to prioritize security updates or restrict access to the configuration files.

References

github.com/taogogo/taocms/issues/28

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.