The plugin register. Used on 1 million+ sites
Custom Post Type UI
7known security flaws found in Custom Post Type UI
since March 2020
Safe from 1.18.2
Version 1.18.2 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
- 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 - Forged requests
Someone could get a signed in administrator to change something without knowing, such as adding a new admin or changing settings, just by visiting a page.
How: The software does not check that a change came from its own pages, so another site can quietly send one through the administrator's browser.
Read about it here - 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
Every known flaw, newest first (7)
- December 2025MinorCross-site scriptingFixed in 1.18.2. Needs a login on the site (Administrator+).
- December 2025MinorMissing checksFixed in 1.18.1. No login needed.
- March 2023AdvisoryForged requestsFixed in 1.13.5.
- March 2023MinorForged requestsFixed in 1.13.5. No login needed.
- March 2020AdvisoryForged requestsFixed in 1.7.4.
- March 2020AdvisoryCross-site scriptingFixed in 1.7.4.
- Date not knownAdvisoryCross-site scriptingFixed in 1.7.4.
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.
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