Is CVE-2017-16790 actively exploited?

No active exploitation of CVE-2017-16790 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2017-16790 be exploited remotely?

Yes. CVE-2017-16790 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2017-16790?

CVE-2017-16790 has a CVSS score of 6.5 (MEDIUM).

HOME VULNERABILITIESCVE-2017-16790

MEDIUM

CVE-2017-16790

CWE-20Published: August 6, 2018· Updated: Jun 17, 2026

6.5

CVSS v3.1

Official Description

An issue was discovered in Symfony before 2.7.38, 2.8.31, 3.2.14, 3.3.13, 3.4-BETA5, and 4.0-BETA5. When a form is submitted by the user, the request handler classes of the Form component merge POST data and uploaded files data into one array. This big array forms the data that are then bound to the form. At this stage there is no difference anymore between submitted POST data and uploaded files. A user can send a crafted HTTP request where the value of a "FileType" is sent as normal POST data that could be interpreted as a local file path on the server-side (for example, "file:///etc/passwd"). If the application did not perform any additional checks about the value submitted to the "FileType", the contents of the given file on the server could have been exposed to the attacker.

NVD Source

Technical Analysis

CVE-2017-16790 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 6.5.