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CVE-2025-58763: Command Injection Vulnerability in Tautulli

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Overview

In this blog post, we will detail an important vulnerability that affects Tautulli, a Python-based monitoring and tracking tool for Plex Media Server. The vulnerability, tagged as CVE-2025-58763, involves command injection that can lead to remote code execution. The issue is particularly pertinent to administrators who have cloned Tautulli directly from GitHub and installed it manually. Given the potential for system compromise or data leakage, understanding and addressing this vulnerability is of high importance.

Vulnerability Summary

CVE ID: CVE-2025-58763
Severity: High (CVSS Score 8.0)
Attack Vector: Network
Privileges Required: Administrator
User Interaction: Required
Impact: Potential system compromise or data leakage

Affected Products

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Product | Affected Versions

Tautulli | v2.15.3 and prior

How the Exploit Works

The vulnerability lies in the `runGit` function in `versioncheck.py` of the Tautulli application. This is because `shell=True` is passed to `subproces.Popen`, making this call susceptible to command injection. An attacker can trigger the vulnerability at the `checkout_git_branch` endpoint, which unsanitizedly stores a user-supplied remote and branch name into the `GIT_REMOTE` and `GIT_BRANCH` configuration keys. These keys are fetched and passed directly into `runGit` using a format string, thus allowing for code execution through `$()` interpolation in a command.

Conceptual Example Code

Below is a conceptual example of how the vulnerability might be exploited. This is a pseudocode representation of an attacker-supplied evil branch name for triggering the exploit.

GIT_BRANCH = "$(malicious_command)"
checkout_git_branch(GIT_REMOTE, GIT_BRANCH)

In the above example, `malicious_command` is the command that the attacker wants to execute on the server. When `checkout_git_branch` is called, it will trigger the `runGit` function with the malicious command, leading to command injection and potentially compromising the server.

How to Mitigate the Vulnerability

To mitigate this vulnerability, users are advised to apply the vendor patch. Tautulli version 2.16.0 contains a fix for this issue. As a temporary mitigation measure, users can also use a Web Application Firewall (WAF) or an Intrusion Detection System (IDS). It is also recommended to avoid cloning Tautulli directly from GitHub and installing it manually, as this is a prerequisite for the vulnerability.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.

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