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.
Published: 2026-05-16
Score: 8.7 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Mon, 18 May 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Sat, 16 May 2026 15:45:00 +0000

Type Values Removed Values Added
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.
Title TextPattern CMS 4.9.0-dev Authenticated Remote Code Execution via Plugin Upload
First Time appeared Textpattern
Textpattern textpattern
Weaknesses CWE-352
CPEs cpe:2.3:a:textpattern:textpattern:4.9.0-dev:*:*:*:*:*:*:*
cpe:2.3:a:textpattern:textpattern:4.9.0:-:*:*:*:*:*:*
cpe:2.3:a:textpattern:textpattern:4.9.0:beta1:*:*:*:*:*:*
cpe:2.3:a:textpattern:textpattern:4.9.0:beta1a:*:*:*:*:*:*
cpe:2.3:a:textpattern:textpattern:4.9.0:beta2:*:*:*:*:*:*
cpe:2.3:a:textpattern:textpattern:4.9.0:beta:*:*:*:*:*:*
Vendors & Products Textpattern
Textpattern textpattern
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


Subscriptions

Textpattern Textpattern
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-05-18T16:50:14.909Z

Reserved: 2026-05-16T14:41:11.033Z

Link: CVE-2021-47976

cve-icon Vulnrichment

Updated: 2026-05-18T16:49:48.664Z

cve-icon NVD

Status : Deferred

Published: 2026-05-16T16:16:23.107

Modified: 2026-06-17T04:18:51.847

Link: CVE-2021-47976

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-17T17:00:34Z

Weaknesses