JetEngine permits Author SVG uploads containing stored JavaScript
JetEngine before 3.8.14 adds SVG to the site-wide upload allowlist without sanitizing file contents. A user with upload_files, such as an Author, can upload an SVG containing JavaScript that executes when any user opens it; on multisite the same behavior overrides a network administrator's upload-type restriction. The record does not disclose the upload endpoint, field, sanitization function, file URL or exact multisite setting path.
- Component
- JetEngine
- Plugin slug
jet-engine- Affected
- < 3.8.14
- Safe version
3.8.14- Published
- Aug 19, 2026
This CVE was published Aug 19, 2026 and is one of 31 known issues for this plugin.
Update, patch or deactivate.
Update JetEngine to 3.8.14 or later, remove untrusted SVG uploads and restrict upload_files until updated.
A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical description
The JetEngine WordPress plugin before 3.8.14 adds SVG to the site-wide list of allowed upload types without sanitising the file contents, allowing users with the upload files capability, such as Authors, to upload a file containing malicious JavaScript that executes in the browser of any user who opens it (Stored Cross-Site Scripting). On multisite, this also overrides an upload-type restriction set by the network administrator.
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H