What is CVE-2021-47976?

CVE-2021-47976 is a high-severity vulnerability in Textpattern Cms, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.8/10. Published 2026-05-16.

How severe is CVE-2021-47976?

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

CSRF in Textpattern Cms

CVE-2021-47976

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 fro…

Vulnerability class: CSRF (Cross-Site Request Forgery)

EPSS: 0.001 (28.7th 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 4.9.0-dev

Weakness classification (CWE)

CWE-352 — Cross-Site Request Forgery (CSRF)

References

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

Frequently asked questions

What is CVE-2021-47976?: CVE-2021-47976 is a high-severity vulnerability in Textpattern Cms, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.8/10. Published 2026-05-16.
How severe is CVE-2021-47976?: High severity. CVSS v3 base score is 8.8 out of 10.