Weblate: Improper access control for pending tasks in API

Impact

The API for tasks didn't verify user access for pending tasks. This could expose logs of in-progress operations to users who don't have access to given scope.

Patches

• https://github.com/WeblateOrg/weblate/pull/18515

Workarounds

The attacker needs to guess the random UUID of the task, so exploiting this is unlikely with the default API rate limits.

References

This issue was identified by Michal Čihař.