What is CVE-2016-10959?

CVE-2016-10959 is a medium-severity vulnerability in Estatik, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 6.5/10. Published 2019-09-16.

How severe is CVE-2016-10959?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2016-10959 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Arbitrary file upload in Estatik

CVE-2016-10959

The estatik plugin before 2.3.1 for WordPress has authenticated arbitrary file upload (exploitable with CSRF) via es_media_images[] to wp-admin/admin-ajax.php.

Vulnerability class: Unrestricted File Upload

Published 2019-09-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.011 (64.4th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 64.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Estatik

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

Public proof-of-concept exploits

References

wordpress.org/plugins/estatik/ (Release Notes)
www.pluginvulnerabilities.com/2016/08/19/authenticated-arbitrary-file-upload-vu… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2016-10959?: CVE-2016-10959 is a medium-severity vulnerability in Estatik, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 6.5/10. Published 2019-09-16.
How severe is CVE-2016-10959?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2016-10959 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.