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TI-2021-22556 Aliases CVE-2021-47943GHSA-3fw2-x5r9-x34j

TextPattern CMS 4.8.7 Remote Code Execution via File Upload

Priority HIGH 73CWE-434Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-434.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00617 49th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
TextpatternTextPattern CMS4.8.7—No fix listedCNA
  • TextPattern CMS VendorTextpattern Affected 4.8.7 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-47943
  2. 2026-10-03 Alias added: GHSA-3fw2-x5r9-x34j

References

Exploit 2

  • TI-2023-09955 An arbitrary file upload vulnerability in the plugin upload function of Textpattern… CVSS 3.1HIGH 8.8
  • TI-2023-18162 Directory Traversal vulnerability in Textpattern CMS v4.8.8 allows a remote authenticated… CVSS 3.1HIGH 7.2
  • TI-2023-11802 An arbitrary file upload vulnerability in the upload plugin of Textpattern v4.8.8 and… CVSS 3.1HIGH 7.2
  • TI-2026-25434 Textpattern CMS 4.9.0: Second-Order XSS via Atom Feed Injection CVSS 4.0MEDIUM 5.1
  • TI-2018-05387 An issue was discovered in Textpattern CMS 4.6.2 and earlier. CVSS 3.0CRITICAL 9.8
  • TI-2020-13637 Textpattern 4.7.3 contains an aribtrary file load via the file_insert function in include/txp_file.php. CVSS 3.1CRITICAL 9.8
See all 31 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences