Provide references for CVE-2018-18668.
Where can I find more information about CVE-2018-18668?
References are available at: https://github.com/gnuboard/gnuboard5/compare/15b2e73...2549172, https://github.com/gnuboard/gnuboard5/commit/a45241f4bc46aee1ab2cc0749f6444b043681edf#diff-53f7f220c2d2861a98444adf09471496, https://github.com/gnuboard/gnuboard5/releases/tag/5.3.2.0.