CVE-2021-47888 Textpattern 4.8.3 - Remote code execution
Authenticated attackers can upload malicious PHP files to Textpattern CMS to execute arbitrary commands on the server.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-47888?
CVE-2021-47888 is a high-severity vulnerability in The Textpattern Development Team Textpattern, published on 23 Jan 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Textpattern versions prior to 4.8.3 contain an authenticated remote code execution vulnerability that allows logged-in users to upload malicious PHP files. Attackers can upload a PHP file with a shell command execution payload and execute arbitrary commands by accessing the uploaded file through a specific URL parameter.
Weakness: CWE-434
Which versions are affected by CVE-2021-47888?
How do I fix CVE-2021-47888?
No fix has been published for CVE-2021-47888 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-47888 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47888 exists.
Sources
Also known as GHSA-h3r5-68q9-fh3p.