There are several unpatched critical vulnerabilities in the latest version of SumatraPDF and also in the latest prerelease version, as described in these issues
Some time has passed without a fix. This is free open source software (and other software) and no of use users has any ground to demand anything and developers have day jobs to prioritize. Still, a fix is urgent.
Can we the community of SumatraPDF users do anything to move things forward?
I can think of two things. One is to set up and donate to a bounty (money reward) for whoever submits a robust fix to the issues to the SumatraPDF github repo.
Another is to if needed make the steps needed to add a fix easier. To add and test a fix would involve building SumatraPDF from source. I haven't built it myself. But currently there is this instruction page
The instruction clearly assumes the reader already knows many things about building and building enviroments. But perhaps there is some steps to clarify there? I know to little to tell if the answer is yes or no. But perhaps someone else can answer that.
Any other suggestions on what we users could do, apart form as a precaution not read any newly downloaded pdf files in SumatraPDF until the issues are fixed?