You can check it either via Magento official security scan tool magento.com/security
When patches have applied a file named applied.patches.list
is added in the app/etc/
directory or straight away check the code specified in the patch file to check if the patch has been applied to confirm it. I have also used some third party scan tools to check if the patch is applied but they are not right all the time.
Please find the patch for your version from Magento Resources. Move the patch file into your Magento root directory. If your patch file has .sh extension sh PATCH_SUPEE-11086_CE_1.5.0.0_v1.sh
, if it has .patch extension patch -p0 < PRODSECBUG-2198-2.2-CE.composer-2019-03-27-06-12-19.patch