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Expression Language Injection
Severity: High
Summary
Netsparker identified a possible expression language injection, which occurs when input data is evaluated by an expression language interpreter.
Even though Netsparker believes there is an expression language injection in here, it could not confirm it. There can be numerous reasons for Netsparker not being able to confirm it. We strongly recommend investigating the issue manually to ensure it is an expression language injection and needs to be addressed.
Impact
An attacker can read server-side data, such as the content of server-side variables, and some other inner configuration details. This is a quite dangerous vulnerability because developers assume their server-side code would not be read by anyone outside, so they may place sensitive information such as passwords, connection strings, database queries, etc. It can also be used for bypassing HttpOnly protection.
Remediation
Apply input validation best practices to ensure there are no EL meta characters("${" and "#{") in the input.
Classifications
PCI v3.1-6.5.1, PCI v3.2-6.5.1, CWE-20, HIPAA-20, ISO27001-A.14.2.5, OWASP 2013-A1, OWASP 2017-A1
, CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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