What’s Vulnerable › Vulnerabilities

CVE-2021-47976: TextPattern CMS 4.9.0-dev Authenticated Remote Code Execution via Plugin Upload

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-16 · updated 2026-06-17
• Weakness: CWE-352

Description

TextPattern CMS 4.9.0-dev contains a remote code execution vulnerability that allows authenticated attackers to upload arbitrary PHP files by exploiting the plugin upload functionality. Attackers can authenticate, retrieve a CSRF token from the plugin event page, and upload malicious PHP files to the textpattern/tmp/ directory for code execution.

Affected products

• TextPattern CMS: 4.9.0-dev

References

• https://github.com/textpattern/textpattern
• https://textpattern.com/
• https://www.exploit-db.com/exploits/50095
• https://www.vulncheck.com/advisories/textpattern-cms-dev-authenticated-remote-code-execution-via-plugin-upload

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