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Description

TextPattern CMS 4.8.7 contains a remote code execution vulnerability that allows authenticated attackers to execute arbitrary commands by uploading malicious PHP files through the file upload functionality. Attackers can upload a PHP shell via the Files section in the content area and execute commands by accessing the uploaded file at /textpattern/files/ with GET parameters passed to the system function.

PUBLISHED Reserved 2026-02-01 | Published 2026-05-10 | Updated 2026-05-10 | Assigner VulnCheck




HIGH: 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
HIGH: 8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Problem types

Unrestricted Upload of File with Dangerous Type

Product status

4.8.7
affected

Credits

Mert Daş merterpreter@gmail.com finder

References

www.exploit-db.com/exploits/49996 (ExploitDB-49996) exploit

www.exploit-db.com/exploits/50415 (ExploitDB-50415) exploit

www.vulncheck.com/...s-remote-code-execution-via-file-upload (VulnCheck Advisory: TextPattern CMS 4.8.7 Remote Code Execution via File Upload) third-party-advisory

cve.org (CVE-2021-47943)

nvd.nist.gov (CVE-2021-47943)

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