sidekiq-unique-jobs UI server vulnerable to XSS & RCE in Redis

Cross site scripting (XSS) potentially exposing cookies / sessions / localStorage, fixed by sidekiq-unique-jobs v8.0.7.

Details

Specially crafted URL query parameters handled by any of the following endpoints of sidekiq-unique-jobs’ “admin” web UI,
allow a super-user attacker, or an unwitting, but authorized, victim, who has received a disguised / crafted link,
to successfully execute malicious code, which could potentially steal cookies, session data,
or local storage data from the app the sidekiq-unique-jobs web UI is mounted in.

If your sidekiq-unique-jobs web UI is mounted at /sidekiq, the vulnerable paths and query parameters are:

• /sidekiq/changelogs
  • filter
  • count
• /sidekiq/locks
  • filter
  • count
• /sidekiq/expiring_locks
  • filter

Impact

This is a vulnerability of critical severity, which impacts many thousands of sites, since sidekiq-unique-jobs is widely deployed across the industry, with multiple attack vectors.

Patches

The fix for the XSS vulnerability was released in sidekiq-unique-jobs v8.0.7.