CVE-2026-18317 Missing authorization in Foxtool All-in-One: Contact chat button, Custom login, Media optimize images
Authenticated subscribers can modify arbitrary plugin settings, potentially enabling SVG uploads and leading to stored XSS.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-18317?
CVE-2026-18317 is a medium-severity missing authorization vulnerability in foxtheme Foxtool All-in-One: Contact chat button, Custom login, Media optimize images, published on 18 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Foxtool All-in-One: Contact chat button, Custom login, Media optimize images plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 2.5.3. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to modify arbitrary subkeys of the foxtool_settings option, including enabling site-wide SVG uploads by toggling the media-up3 key, which can facilitate stored cross-site scripting via malicious SVG files.
Weakness: CWE-862
Which versions are affected by CVE-2026-18317?
How do I fix CVE-2026-18317?
No fix has been published for CVE-2026-18317 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-18317 being exploited?
There is no known exploitation of CVE-2026-18317 in the wild and no public exploit code.
Sources
Also known as GHSA-qh3r-rp3m-qv6c.