CVE-2017-16790
mediumpriority · track · 27EPSS 0.016 · 75 %ileEURUUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (20)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- GHSA-cqqh-94r6-wjrgSymfony SSRF Vulnerability via Form Component2022-05-14ghsa · osvUS
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.
also known as (4)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (6)
External citations — patches, advisories, analysis.
- https://symfony.com/blog/cve-2017-16790-ensure-that-submitted-data-are-uploaded-filescnnvd
- https://www.debian.org/security/2018/dsa-4262cnnvd
- https://symfony.com/blog/cve-2017-16790-ensure-that-submitted-data-are-uploaded-filesenisa_euvd
- https://www.debian.org/security/2018/dsa-4262enisa_euvd
- https://symfony.com/blog/cve-2017-16790-ensure-that-submitted-data-are-uploaded-filesIssue TrackingPatchVendor Advisorynvd
- https://www.debian.org/security/2018/dsa-4262Third Party Advisorynvd
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