External risk intelligence

Busiprof Theme CSRF Allows Web Shell Upload

CVE advisorySeverity: CRITICAL (CVSS 9.6)

CVE-2026-39619

This vulnerability affects a WordPress theme, which is a component of a web application. WordPress sites are frequently deployed as public-facing web services, making the theme's features, including file upload functionality, commonly accessible via the internet.

Cross-site Request Forgery

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 Cross-Site Request Forgery (CSRF) vulnerability has been identified in the Busiprof theme, potentially allowing unauthorized users to upload malicious files to a web server. This could impact web application integrity and security by enabling the introduction of harmful code.

Enables malicious file uploads via web servers.
Critical risk to web application integrity.
Confirm relevance and assess exposure.

Attack Path

How an attacker could exploit the issue

An attacker could trick a user into performing an action that uploads a malicious web shell to a web server. This is possible because the application does not properly check if the user is authorized to perform the upload. An attacker could then use this web shell to take control of the server.

Requires user interaction.
Triggers file upload functionality.
Allows remote code execution.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow an attacker to upload a web shell to a web server when a user interacts with a malicious link. This could lead to the compromise of the web server, affecting its services and any data it hosts.

Web server access and hosted data.
Malicious link interaction by a user.
Web server compromise and data exposure.

Operational Fix

Recommended remediation, mitigation, and detection steps

This CSRF vulnerability in the Busiprof theme requires immediate attention from application owners and potentially platform or infrastructure teams responsible for the web server. The first practical step is to identify all instances of the affected Busiprof theme, confirm their exposure to the internet, and then engage the accountable owner to plan remediation based on risk.

Application owners must confirm theme usage.
Verify public accessibility and critical business impact.
Coordinate vendor engagement for mitigation.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

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Frequently asked questions

What is the Busiprof theme?

Busiprof is a WordPress theme used to design and manage the visual layout and content presentation of websites built on the WordPress platform. Because it operates within a web server environment, it often includes integrated tools for handling file uploads—such as images or media—which support site customization but can also introduce security risks if those upload processes are not strictly controlled.

How does CWE-352 relate to CVE-2026-39619?

CVE-2026-39619 is categorized as CWE-352, known as Cross-Site Request Forgery (CSRF). This vulnerability occurs when a web application fails to verify that an incoming request was intentionally initiated by an authorized user. In this specific case, the flaw allows an attacker to trick a logged-in user into unknowingly submitting a request that triggers a file upload, potentially resulting in the unauthorized placement of harmful scripts on the server.

Do I need to be logged into Busiprof to trigger this bug?

No, you do not need to be an administrator or have an account to be a target, but the bug requires specific user interaction. An attacker typically triggers the vulnerability by deceiving a legitimate, authenticated user—such as an administrator—into clicking a malicious link or visiting a compromised site. Without that interaction to initiate the request, the file upload mechanism is not triggered.

Is my site at risk if it uses Busiprof?

According to Halo Surface Signal, this vulnerability is considered a likely risk because WordPress themes are frequently deployed on public-facing web services. If your site is accessible via the internet, the functionality used for this upload process is often reachable by external actors. Sites that are internal-only or have restricted access have a smaller attack surface, but external exposure significantly increases the potential for exploitation.

When should I take action for CVE-2026-39619?

You should prioritize assessing this vulnerability immediately if your infrastructure relies on the Busiprof theme. Begin by auditing your environment to confirm where this specific theme is installed. Once identified, evaluate whether the site is internet-facing and coordinate with your web management team to verify the status of the theme and determine the necessary path for applying vendor-provided security updates or mitigation steps.

References

patchstack.com/database/Wordpress/Theme/busiprof/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.