Language: Java
Label: vulnerable
CWE: CWE-74 \u2014 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.

Code:
  public void setLabelParams() throws Exception {
    assertPlotParam("ylabel", "This is good");
    assertPlotParam("ylabel", " and so Is this - _ yay");
    assertInvalidPlotParam("ylabel", "[33:system(%20");
    assertInvalidPlotParam("title", "[33:system(%20");
    assertInvalidPlotParam("y2label", "[33:system(%20");
  }