Language: PHP
Label: vulnerable
CWE: CWE-94 \u2014 Improper Control of Generation of Code ('Code Injection')
The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.

Code:
	protected function fixTags($tags) {
		// move @ tags out of variable namespace
		foreach ($tags as &$tag) {
			if ($tag{0} == $this->lessc->vPrefix)
				$tag[0] = $this->lessc->mPrefix;
		}
		return $tags;
	}