CriticalPublic exploit

Authenticated command injection in Pi-hole allowlist management

IdentifiersCVE-2025-34087CWE-78· Improper Neutralization of Special…

CVE-2025-34087 is an authenticated OS command injection vulnerability affecting Pi-hole versions up to 3.3 in the legacy AdminLTE web interface. When a user adds a domain to the allowlist through the web UI, the supplied domain parameter is not properly sanitized before being incorporated into an operating system command. An authenticated attacker can append shell metacharacters or additional commands to the domain string, causing arbitrary OS commands to be executed on the underlying host. The injected commands run with the privileges of the Pi-hole service user rather than full root, but still provide direct command execution on the appliance or host system. The issue was present in the legacy AdminLTE interface and was patched in later versions.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation gives an authenticated attacker arbitrary command execution on the Pi-hole host in the security context of the Pi-hole service user. This can enable compromise of the Pi-hole instance, modification of DNS filtering configuration, access to locally available data and configuration files readable by that user, installation of persistence mechanisms available within that privilege boundary, and potential follow-on privilege escalation depending on host configuration. At minimum, the flaw can be used to alter service behavior or disrupt DNS filtering operations.

Mitigation

If you can’t patch tonight, do this now.

Restrict access to the Pi-hole administrative web interface to trusted administrators only, ideally via network ACLs, VPN, or reverse-proxy access controls. Disable or avoid use of the legacy AdminLTE interface if it is still exposed. Enforce strong authentication for admin accounts and monitor allowlist modification activity for suspicious entries containing shell metacharacters or malformed domain values. Where possible, harden the host so the Pi-hole service user has minimal privileges and limited ability to execute or affect other system components.

Remediation

Patch, then assume compromise.

Upgrade Pi-hole to a version in which the legacy AdminLTE allowlist handling has been patched. If an immediate upgrade is not possible, remove or disable the vulnerable legacy AdminLTE interface where feasible and ensure the application uses corrected input handling for allowlist domain submission. Review the code path that processes allowlist additions to ensure domain input is strictly validated against expected hostname syntax and never passed unsafely to shell commands.

PUBLIC EXPLOITS

Exploits

1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.

VALID 1 / 1 TOTALView more in app

pihole_whitelist_exec.rbMaturityWeaponizedFrameworkmetasploitVerified exploit

This repository contains a single Metasploit module (modules/exploits/unix/http/pihole_whitelist_exec.rb) that exploits a command injection vulnerability in Pi-Hole versions 3.3 and below (CVE-2025-34087). The exploit targets the web interface, specifically the whitelist feature, by injecting OS commands into the 'domain' parameter when adding a new domain to the whitelist. The module uses HTTP requests to interact with the Pi-Hole admin interface, retrieves an authentication token, and submits a crafted POST request to /admin/scripts/pi-hole/php/add.php to achieve command execution. The exploit supports command stager payloads, allowing for the execution of arbitrary commands or more complex payloads such as reverse shells. The module is operational and requires the target to be accessible over the network, with the web interface exposed and (if enabled) valid credentials provided. The code is written in Ruby and is structured as a standard Metasploit exploit module.

Disclosed Apr 15, 2018rubynetwork

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

Pi-HolePi-Holeapplication

Pi-HoleWeb Interfaceapplication

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ACTIVITY FEED

Recent activity

6 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.

6 SOURCESView more in app

No news coverage yet. Advisories and community discussion only.

What this page doesn’t show

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Exposure mapping

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Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity6