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CRITICAL

CVE-2026-58480

CVSS v3

9.8

CRITICAL

EPSS Score

3.6 %

exploit probability, as of 2026-09-25

CISA KEV

No

known exploited

Exploitation

—

SSVC status

Description

Blocksy Companion Pro plugin for WordPress before 2.1.47 contains an unauthenticated arbitrary file upload vulnerability that allows attackers to upload executable files by bypassing extension validation in the save_attachments function exposed through the Advanced Reviews feature. Attackers can exploit the Custom Fonts extension's flawed strpos() substring check by uploading double-extension filenames such as shell.woff2.php, causing the validation to pass on the substring match while the web s

Technical details

Published
2026-07-08
Last Modified
2026-07-08
Exploit-DB
EDB-52640

Frequently asked questions

What is CVE-2026-58480?

Blocksy Companion Pro plugin for WordPress before 2.1.47 contains an unauthenticated arbitrary file upload vulnerability that allows attackers to upload executable files by bypassing extension validation in the save_attachments function exposed through the Advanced Reviews feature. Attackers can exploit the Custom Fonts extension's flawed strpos() substring check by uploading double-extension filenames such as shell.woff2.php, causing the validation to pass on the substring match while the web s

Is CVE-2026-58480 actively exploited?

Active exploitation of CVE-2026-58480 has not been confirmed. Its EPSS score was 3.6% on 2026-09-25, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-58480?

CVE-2026-58480 has a CVSS v3 base score of 9.8 (CRITICAL severity).

Is CVE-2026-58480 affecting your environment?

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