TI-2026-39292 Aliases CVE-2026-54416 GHSA-fvwx-9qcr-crph

Pluck CMS - Unrestricted File Upload via Missing .php8 Extension in Upload Blacklist

LOW 34CWE-434Published 2026-08-05 · Updated 2026-08-10

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-434.

Summary

Pluck CMS through 4.7.21 restricts dangerous file uploads in its admin file-management feature using a fixed blacklist in data/inc/files.php ('.php','php3','php4','php5','php6','php7','phtml','.phtm','.pht','.ph3','.ph4','.ph5','.asp','.cgi','.phar'), checked against the last 4-5 characters of the filename.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00499 43rd percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
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

Vendor	Product	Affected versions	Fixed in	Status	Source
pluck-cms	Pluck CMS	up to 4.7.21	—	No fix listed	CNA

Pluck CMS Vendorpluck-cms Affected up to 4.7.21 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-54416
2026-10-03 Alias added: GHSA-fvwx-9qcr-crph

References

Advisory 1

https://github.com/pluck-cms/pluck

TI-2020-13919 File Upload vulnerability in PluckCMS v.4.7.10 dev versions allows a remote attacker to… CVSS 3.1CRITICAL 9.8
TI-2023-11910 An issue discovered in /admin.php in Pluck CMS 4.7.15 through 4.7.16-dev5 allows remote… CVSS 3.1HIGH 7.2
TI-2020-13954 File Upload vulnerability in PluckCMS v.4.7.10 allows a remote attacker to execute… CVSS 3.1HIGH 7.2
TI-2020-13945 File upload vulnerability in Pluck CMS v.4.7.10-dev2 allows a remote attacker to execute… CVSS 3.1HIGH 7.2
TI-2020-13944 An issue discovered in Pluck CMS v.4.7.10-dev2 allows a remote attacker to execute… CVSS 3.1HIGH 7.2
TI-2023-27623 An arbitrary file upload vulnerability in the component /inc/modules_install.php of… CVSS 3.1HIGH 8.8

See all 47 →

Sources

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