CVE-2026-4782: Arbitrary File Access in Avada Builder
Platform
wordpress
Component
fusion-builder
Fixed in
3.15.3
CVE-2026-4782 describes an Arbitrary File Access vulnerability affecting the Avada (Fusion) Builder plugin for WordPress. This vulnerability allows authenticated attackers, even those with Subscriber-level access, to read arbitrary files on the server. The issue impacts versions 0.0.0 through 3.15.2, with a partial fix introduced in 3.15.2 and a full resolution in version 3.15.3.
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Impact and Attack Scenarios
An attacker exploiting CVE-2026-4782 can leverage the 'fusiongetsvgfromfile' function via the 'customsvg' parameter of the 'fusionsection_separator' shortcode to read any file accessible to the webserver process. This could include configuration files containing database credentials, API keys, or other sensitive information. Successful exploitation could lead to complete compromise of the WordPress instance and potentially the underlying server. The ability to read arbitrary files significantly expands the attack surface, allowing attackers to gain a deeper understanding of the system's configuration and identify further vulnerabilities.
Exploitation Context
CVE-2026-4782 was published on 2026-05-13. Its CVSS score of 6.5 (MEDIUM) indicates a moderate risk. Public proof-of-concept (POC) code is currently unavailable, but the vulnerability's ease of exploitation suggests it could become a target for automated scanning and exploitation. The vulnerability is not currently listed on CISA Known Exploited Vulnerabilities (KEV) catalog, but its relatively simple exploitation path warrants monitoring.
Threat Intelligence
Exploit Status
CISA SSVC
CVSS Vector
What do these metrics mean?
- Attack Vector
- Network — remotely exploitable over the internet. No physical or local access required. Widest attack surface.
- Attack Complexity
- Low — no special conditions required. Attacker can exploit reliably without depending on rare configurations or timing.
- Privileges Required
- Low — any valid user account is sufficient. Basic authenticated access required.
- User Interaction
- None — attack is automatic and silent. Victim does nothing: no click, no file open.
- Scope
- Unchanged — impact is limited to the vulnerable component itself.
- Confidentiality
- High — complete confidentiality loss. Attacker can read all data: credentials, keys, personal data.
- Integrity
- None — no integrity impact. Attacker cannot modify data.
- Availability
- None — no availability impact. Service remains fully operational.
Affected Software
Weakness Classification (CWE)
Timeline
- Reserved
- Published
Mitigation and Workarounds
The primary mitigation for CVE-2026-4782 is to immediately upgrade the Avada (Fusion) Builder plugin to version 3.15.3 or later. If upgrading is not immediately feasible, consider implementing a temporary workaround by restricting access to the 'fusiongetsvgfromfile' function or the 'custom_svg' parameter. Web Application Firewalls (WAFs) can be configured to block requests containing suspicious patterns targeting this function. Review WordPress file permissions to ensure the webserver user has minimal necessary access.
How to fix
Update to version 3.15.3, or a newer patched version
Frequently asked questions
What is CVE-2026-4782 — Arbitrary File Access in Avada Builder?
CVE-2026-4782 is a vulnerability in the Avada (Fusion) Builder WordPress plugin allowing authenticated users to read arbitrary files on the server. It affects versions 0.0.0–3.15.2 and has a CVSS score of 6.5 (MEDIUM).
Am I affected by CVE-2026-4782 in Avada Builder?
You are affected if your WordPress site uses the Avada (Fusion) Builder plugin in versions 0.0.0 through 3.15.2. Check your plugin version immediately.
How do I fix CVE-2026-4782 in Avada Builder?
Upgrade the Avada (Fusion) Builder plugin to version 3.15.3 or later. This resolves the Arbitrary File Access vulnerability.
Is CVE-2026-4782 being actively exploited?
While no public exploits are currently widespread, the vulnerability's ease of exploitation suggests it could become a target. Continuous monitoring is recommended.
Where can I find the official Avada advisory for CVE-2026-4782?
Refer to the official Avada plugin website and WordPress plugin repository for updates and security advisories related to CVE-2026-4782.
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