What is CVE-2021-47943?

CVE-2021-47943 is a high-severity vulnerability in Textpattern Cms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2026-05-10.

How severe is CVE-2021-47943?

High severity. CVSS v3 base score is 8.8 out of 10.

Arbitrary file upload in Textpattern Cms

CVE-2021-47943

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…

Vulnerability class: Unrestricted File Upload

EPSS: 0.003 (50.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Textpattern Cms — versions 4.8.7

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

disclosure@vulncheck.com (exploit)
disclosure@vulncheck.com (exploit)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2021-47943?: CVE-2021-47943 is a high-severity vulnerability in Textpattern Cms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2026-05-10.
How severe is CVE-2021-47943?: High severity. CVSS v3 base score is 8.8 out of 10.