The plugin register. Used on 300,000+ sites
WebP Express
6known security flaws found in WebP Express
since December 2018
Safe from 0.25.16
Version 0.25.16 or later fixes all of them. A site on an older version is open to them.
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When they were found.
DangerousMajorMinorAdvisory
What they could let someone do.
What could happen
- Reading files
Someone could read files on the server they should never see, such as the settings file holding the database password, or delete files the site needs.
How: The software takes a file name from a request and does not check that it stays inside its own folder.
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 - Information leak
It could give away information that should stay private, such as user details, file locations or settings, which makes other attacks easier.
How: The software shows, sends or logs more than it should.
Every known flaw, newest first (6)
- December 2025MinorInformation leakFixed in 0.25.11. No login needed.
- December 2025AdvisoryCross-site scriptingFixed in 0.25.16.
- June 2019MinorCross-site scriptingFixed in 0.14.11. Needs a login on the site.
- June 2019AdvisoryCross-site scriptingFixed in 0.14.8.
- June 2019AdvisoryForged requestsFixed in 0.14.1.
- December 2018MajorReading filesFixed in 0.14.11. No login needed.
From the public lists of known flaws, checked daily. A flaw is listed once it is made public, often after a fix is out.
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