CVE-2026-1263 Webling <= 3.9.0 - Authenticated (Subscriber+) Stored Cross-Site Scripting via 'title' Parameter
Authenticated attackers can inject malicious scripts into Webling forms and memberlists, which execute when administrators view them.
- 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-2026-1263?
CVE-2026-1263 is a medium-severity cross-site scripting vulnerability in usystemsgmbh Webling, published on 10 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Webling plugin for WordPress is vulnerable to Stored Cross-Site Scripting in all versions up to, and including, 3.9.0 due to insufficient input sanitization, insufficient output escaping, and missing capabilities checks in the 'webling_admin_save_form' and 'webling_admin_save_memberlist' functions. This makes it possible for authenticated attackers, with Subscriber-level access and above, to inject Webling forms and memberlists with arbitrary web scripts that will execute whenever an administrator views the related form or memberlist area of the WordPress admin.
Weakness: CWE-79
Which versions are affected by CVE-2026-1263?
How do I fix CVE-2026-1263?
No fix has been published for CVE-2026-1263 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-2026-1263 being exploited?
There is no known exploitation of CVE-2026-1263 in the wild and no public exploit code.
Sources
Also known as GHSA-983g-7xfg-6jxc.