External risk intelligence

Hostme v2 Object Injection Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2026-112848

This vulnerability affects a WordPress theme, which is by definition a web-based application component. WordPress themes are commonly deployed in public-facing web environments, making them inherently accessible to remote network requests in standard website configurations.

Deserialization

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 security flaw has been identified in the Hostme v2 technology, specifically related to how it handles untrusted data, which could allow unauthorized code execution. This vulnerability could potentially impact systems using this technology if left unaddressed.

Flaw allows untrusted data to be injected.
Affects web-facing application components.
Confirm relevance and potential exposure.

Attack Path

How an attacker could exploit the issue

An attacker could exploit this vulnerability by sending specially crafted data over the network to a vulnerable Hostme v2 installation. The application's improper handling of this data allows for the injection of malicious objects, potentially leading to the compromise of the entire system.

No user interaction needed.
Triggered by unauthenticated network requests.
Allows full system compromise.

Live Threat

Current exploitation, exposure, and threat context

A deserialization of untrusted data vulnerability in AivahThemes Hostme v2 could allow an attacker to inject arbitrary objects into the application when supported by the advisory. This could potentially lead to the execution of malicious code or unauthorized modification of system behavior.

Hostme v2 application data.
Via network requests to the application.
Compromised application integrity.

Operational Fix

Recommended remediation, mitigation, and detection steps

The "Hostme v2" WordPress theme, specifically versions up to and including 7.0, contains a deserialization vulnerability that could allow for object injection. This impacts any organization using this theme on their WordPress sites. The initial practical step is to identify all instances of "Hostme v2" in your environment, determine their exposure (especially public-facing sites), and confirm their business criticality to prioritize remediation efforts.

Application owners should own the issue.
Verify reachability and business criticality first.
Plan remediation based on confirmed risk.

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 the Hostme v2 theme?

Hostme v2 is a WordPress theme by AivahThemes used to control the visual presentation and layout of websites. Themes like this function as integral parts of the WordPress ecosystem, managing how content is rendered to visitors. Because they run within the application environment, they often handle data processing tasks that interact directly with the underlying server.

What does CWE-502 mean for CVE-2026-112848?

CWE-502 refers to Deserialization of Untrusted Data. In plain terms, this means the software takes data from an external source and turns it back into a complex object without properly checking if that data is safe. Because Hostme v2 does not validate this incoming information, an attacker can supply specially crafted data that the application then blindly trusts, potentially forcing the system to execute unauthorized commands or change its behavior.

How is this vulnerability triggered?

The flaw is triggered when an attacker sends a malicious network request to a site running a vulnerable version of the Hostme v2 theme. No user interaction or authentication is required for this to occur. It is important to note that simply viewing a site or browsing legitimate content does not trigger the bug; the attacker must intentionally send a specifically crafted data payload to the application to exploit the deserialization process.

Is my site at risk according to Halo Surface Signal?

Yes, if your site uses the affected theme. Halo Surface Signal classifies this as external because WordPress themes are web-based components designed for public-facing environments. Since the application is inherently accessible to remote network requests, any instance of Hostme v2 exposed to the internet is considered reachable by potential attackers looking to leverage this vulnerability.

What should I do if I use Hostme v2?

Your first step is to create an inventory of all websites in your environment to identify which ones are running the Hostme v2 theme. Once identified, confirm the specific version in use and prioritize sites that are public-facing or handle sensitive business functions. Since this is a critical issue, move quickly to evaluate the necessity of the theme and coordinate with your technical team to plan for updates or removal.

References

patchstack.com/database/wordpress/theme/hostmev2/vulnerability/wordp…

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.