The plugin register. Used on 400,000+ sites
SiteSEO
4known security flaws found in SiteSEO
since August 2025
Safe from 1.3.3
Version 1.3.3 or later fixes all of them. A site on an older version is open to them.
Or let us look for you
When they were found.
DangerousMajorMinorAdvisory
What they could let someone do.
What could happen
- Missing checks
Someone could do things only an administrator should: change settings, see private data, or give themselves more rights.
How: Part of the software forgets to check who is asking before it does what was asked.
Read about it here - 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 (4)
- November 2025MinorMissing checksFixed in 1.3.3. No login needed.
- November 2025MinorMissing checksFixed in 1.3.3. Needs a login on the site.
- October 2025MinorMissing checksFixed in 1.3.2. Needs a login on the site (Author+).
- August 2025MinorCross-site scriptingFixed in 1.2.8. 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.