CVE-2017-20290 | Discourse up to 1.9.0.beta12 Email Unsubscription unsubscribed.html.erb email cross site scripting

October 22, 2026 Yanac

A vulnerability, which was classified as problematic, has been found in Discourse up to 1.9.0.beta12. Impacted is an unknown function of the file unsubscribed.html.erb of the component Email Unsubscription. Performing a manipulation of the argument email results in cross site scripting. This vulnerability only affects products that are no longer supported by the maintainer.

This vulnerability is known as CVE-2017-20290. Remote exploitation of the attack is possible. No exploit is available.

It is advisable to upgrade the affected component.VulDB Recent EntriesRead More