What’s Vulnerable › Vulnerabilities

CVE-2021-47888: Textpattern 4.8.3 - Remote code execution

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-23 · updated 2026-06-17
• Weakness: CWE-434

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.

Affected products

• The Textpattern Development Team Textpattern: 4.8.3

References

• https://textpattern.com/
• https://textpattern.com/start
• https://www.exploit-db.com/exploits/49620
• https://www.vulncheck.com/advisories/textpattern-remote-code-execution
• https://www.exploit-db.com/exploits/49620

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