Decidim Cross-site Scripting vulnerability in the processes filter
### Impact
The processes filter feature is susceptible to Cross-site scripting. This allows a remote attacker to execute JavaScript code in the context of a currently logged-in user. An attacker could use this vulnerability to make other users endorse or support proposals they have no intention of supporting or endorsing.
### Patches
The problem was patched in v0.27.3
https://github.com/decidim/decidim/releases/tag/v0.27.3 and v0.26.7
https://github.com/decidim/decidim/releases/tag/v0.26.7