What is CVE-2017-15580?

CVE-2017-15580 is a critical-severity vulnerability in Osticket, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2017-10-23.

How severe is CVE-2017-15580?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2017-15580 known to be exploited?

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

Arbitrary file upload in Osticket

CVE-2017-15580

osTicket 1.10.1 provides a functionality to upload 'html' files with associated formats. However, it does not properly validate the uploaded file's contents and thus accepts any type of file, such as with a tickets.php request that is modified with a .html extension changed to a .exe extension. An attacker can leverage this vulnerability to upload arbitrary files on the web application having malicious content.

Vulnerability class: Unrestricted File Upload

Published 2017-10-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.156 (96.8th percentile), scored 2026-10-08.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 96.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.156 · newest: 0.156 · change: 0.000

Affected products

Osticket — versions 1.10.1

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

Public proof-of-concept exploits

ARPSyndicate/cvemon

References

becomepentester.blogspot.com/2017/10/osTicket-File-Upload-Restrictions-Bypassed… (Exploit, Third Party Advisory)
packetstormsecurity.com/files/144747/osticket1101-shell.txt (Exploit, VDB Entry, Third Party Advisory)
www.exploit-db.com/exploits/45169/ (Exploit, VDB Entry, Third Party Advisory, exploit)
0day.today/exploits/28864 (Third Party Advisory)
cxsecurity.com/issue/WLB-2017100187 (Exploit, Third Party Advisory)
www.cyber-security.ro/blog/2017/10/25/osticket-1-10-1-shell-upload/ (Broken Link)
nakedsecurity.com/cve/CVE-2017-15580/ (Third Party Advisory)

Frequently asked questions

What is CVE-2017-15580?: CVE-2017-15580 is a critical-severity vulnerability in Osticket, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2017-10-23.
How severe is CVE-2017-15580?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2017-15580 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.