Adobe Acrobat and Reader versions 2018.011.20038 and earlier, 2017.011.30079 and earlier, and 2015.006.30417 and earlier have a Security Bypass vulnerability. Successful exploitation could lead to information disclosure.
https://www.zerodayinitiative.com/advisories/ZDI-18-463/
https://helpx.adobe.com/security/products/acrobat/apsb18-09.html