CVE-2026-5108 Cross-site scripting in Super Progressive Web Apps
Administrators can inject arbitrary scripts via the offline message setting, leading to stored XSS execution for users triggering the offline snackbar.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-5108?
CVE-2026-5108 is a medium-severity cross-site scripting vulnerability in superpwa Super Progressive Web Apps, published on 5 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
The Super Progressive Web Apps plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `superpwa_settings[offline_message_txt]` setting in all versions up to, and including, 2.2.43. This is due to insufficient input sanitization and output escaping. The offline message value is stored without sanitization, passed to the frontend via `wp_localize_script()` without escaping, and rendered using `innerHTML` in the JavaScript snackbar component. This makes it possible for authenticated attackers, with Administrator-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user triggers the offline snackbar.
Weakness: CWE-79
Which versions are affected by CVE-2026-5108?
How do I fix CVE-2026-5108?
No fix has been published for CVE-2026-5108 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-2026-5108 being exploited?
There is no known exploitation of CVE-2026-5108 in the wild and no public exploit code.
Sources
Also known as GHSA-p46p-m4cq-5fh8.