What is CVE-2017-9091?

CVE-2017-9091 is a high-severity vulnerability in Allen Disk Project, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2017-05-19.

How severe is CVE-2017-9091?

High severity. CVSS v3 base score is 7.5 out of 10.

Improper input validation in Allen Disk Project

CVE-2017-9091

/admin/loginc.php in Allen Disk 1.6 doesn't check if isset($_SESSION['captcha']['code']) == 1, which leads to CAPTCHA bypass by emptying $_POST['captcha'].

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2017-05-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.013 (69.6th percentile), scored 2026-10-06.

Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 69.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

Allen Disk Project — versions 1.6

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

github.com/s3131212/allendisk/issues/23 (Patch, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2017-9091?: CVE-2017-9091 is a high-severity vulnerability in Allen Disk Project, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2017-05-19.
How severe is CVE-2017-9091?: High severity. CVSS v3 base score is 7.5 out of 10.