CVSS v3
8.8
HIGH
EPSS Score
0.6%
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
The MaxUpload – Big File Uploads – Increase Maximum File Upload Size plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 1.4.0 via the handle_upload function. This is due to a filename-validation mismatch in the handle_upload function where extension and MIME checks are applied to the uploaded chunk's filename but not to the final assembled filename derived from the resumableFilename parameter. This makes it possible for unauthenticated attackers to
The MaxUpload – Big File Uploads – Increase Maximum File Upload Size plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 1.4.0 via the handle_upload function. This is due to a filename-validation mismatch in the handle_upload function where extension and MIME checks are applied to the uploaded chunk's filename but not to the final assembled filename derived from the resumableFilename parameter. This makes it possible for unauthenticated attackers to
Active exploitation of CVE-2026-15965 has not been confirmed. The EPSS score is 0.6%, indicating the estimated probability of exploitation in the next 30 days.
CVE-2026-15965 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string 3.1.
Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.
Ranked by exploit probability (EPSS).