Version 5.6.40 was released in January 2019, and it has many known security issues because it reached end-of-life on December 31, 2018 (no more security patches).

Official Sources

    1. CVE-2018-14851: A vulnerability in the exif extension that could allow remote attackers to cause a denial of service (DoS) or potentially execute arbitrary code.
    2. CVE-2018-14852: A vulnerability in the exif extension that could allow remote attackers to cause a DoS or potentially execute arbitrary code.
    3. CVE-2018-7208: A vulnerability in the gif2h function that could allow remote attackers to cause a DoS.

    Benefits: