The plugin register. Used on 200,000+ sites
Header and Footer Scripts
1known security flaw found in Header and Footer Scripts
since January 2026
Safe from 2.4.0
Version 2.4.0 or later fixes it. A site on an older version is open to it.
Or let us look for you
When they were found.
DangerousMajorMinorAdvisory
What they could let someone do.
What could happen
- Cross-site scripting
Someone could make your pages run their own script in visitors' browsers, to steal logins, show a fake payment form or send people to a scam site.
How: The software puts text it was sent back onto a page without making it safe first, so a script hidden in a link, form or comment runs as if it were part of your site.
Read about it here
Every known flaw, newest first (1)
- January 2026MinorCross-site scriptingFixed in 2.4.0. Needs a login on the site (Contributor+).
From the public lists of known flaws, checked daily. A flaw is listed once it is made public, often after a fix is out.
Be told the day a new one is found.
Mendbird checks your site every morning against the lists of known flaws, and emails you in plain English the day one hits something you run. Free for 14 days, then £9 a month.