The plugin register. Used on 10 million+ sites
Contact Form 7
12known security flaws found in Contact Form 7
since February 2014
Safe from 6.0.6
Version 6.0.6 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
- Running code
Someone could run their own code on the server and take the site over: add malware, send spam, steal data, or use it to attack others.
How: Part of the software treats something it was sent as instructions to follow, or keeps an uploaded file somewhere it can be run.
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 - Open redirect
Links that start with your address could send visitors on to a scam site, borrowing your good name.
How: The software forwards visitors to an address given in the link without checking it.
Every known flaw, newest first (12)
- April 2025MinorA security flawFixed in 6.0.6. No login needed.
- June 2024MinorOpen redirectFixed in 5.9.5. No login needed.
- March 2024MinorCross-site scriptingFixed in 5.9.2. No login needed.
- November 2023MajorRunning codeFixed in 5.8.4. Needs a login on the site (Editor+).
- December 2020DangerousRunning codeFixed in 5.3.2. No login needed.
- December 2020AdvisoryA security flawFixed in 5.3.2.
- September 2018AdvisoryMissing checksFixed in 5.0.4.
- September 2018DangerousMissing checksFixed in 5.0.4. No login needed.
- August 2014AdvisoryA security flawFixed in 3.5.3.
- August 2014AdvisoryRunning codeFixed in 3.5.3.
- February 2014AdvisoryA security flawFixed in 3.7.2.
- Date not knownAdvisoryRunning codeFixed in 3.5.3.
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.