High 8.8Published May 16, 2026

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

Updated under an hour ago (Oct 27, 2026, 12:40 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-352
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: May 18, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Textpattern TextPattern CMS textpattern:cms (from the name)	4.9.0-dev	CNA record

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.