CVE-2026-18202 JetEngine < 3.8.14 - Author+ Stored XSS via SVG Upload
Authors can upload malicious SVG files to execute JavaScript in other users' browsers, bypassing multisite upload restrictions.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-18202?
CVE-2026-18202 is a medium-severity cross-site scripting vulnerability in Unknown JetEngine, published on 19 Aug 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-79
Which versions are affected by CVE-2026-18202?
How do I fix CVE-2026-18202?
No fix has been published for CVE-2026-18202 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-18202 being exploited?
There is no known exploitation of CVE-2026-18202 in the wild and no public exploit code.
Sources
Also known as GHSA-464x-9859-hv34.