wkhtmlTOpdf 0.12.6 is vulnerable to SSRF which allows an attacker to get initial access into the target's system by injecting iframe tag with initial asset IP address on it's source. This allows the attacker to takeover the whole infrastructure by accessing their internal assets.
Directory traversal vulnerability in wkhtmltopdf through 0.12.5 allows remote attackers to read local files and disclose sensitive information via a crafted html file running with the default configurations.