CVE-2016-9499
The Accellion FTP server prior to version FTA_9_12_220 is vulnerable to cross-site scripting.
Accellion FTP server prior to version FTA_9_12_220 only returns the username in the server response if the username is invalid. An attacker may use this information to determine valid user accounts and enumerate them.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
Accellion FTP server prior to version FTA_9_12_220 only returns the username in the server response if the username is invalid. An attacker may use this information to determine valid user accounts and enumerate them.
- Record
CVE-2016-9499- CVSS 3.0
- 5.3 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:N - Weakness
- CWE-204, CWE-200
- Updated
- 2026-11-02
CVE List No score
The Accellion FTP server prior to version FTA_9_12_220 is vulnerable to cross-site scripting.
Accellion FTP server prior to version FTA_9_12_220 only returns the username in the server response if the username is invalid. An attacker may use this information to determine valid user accounts and enumerate them.
- Record
CVE-2016-9499- Weakness
- CWE-204
- Updated
- 2026-11-02
EUVDEUVD-2016-10305 No score
Accellion FTP server prior to version FTA_9_12_220 only returns the username in the server response if the username is invalid. An attacker may use this information to determine valid user accounts and enumerate them.
- Record
EUVD-2016-10305- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-64mw-c7hp-gmxw
Accellion FTP server prior to version FTA_9_12_220 only returns the username in the server...
Accellion FTP server prior to version FTA_9_12_220 only returns the username in the server response if the username is invalid. An attacker may use this information to determine valid user accounts and enumerate them.
- Record
GHSA-64mw-c7hp-gmxw- CVSS 3.0
- 5.3 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-200
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, products | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2016-9499 is a medium vulnerability (CVSS 5.3) in Accellion Ftp Server, published July 13, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 7.67%, the 94th percentile. No source names a fixed version.