CVE-2025-67202 Sidekiq-cron is vulnerable to a cross-site scripting (xss) vulnerability via crafted URL
An attacker can execute arbitrary scripts in the context of users viewing the Sidekiq-cron dashboard via a crafted URL.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2025-67202?
CVE-2025-67202 is a medium-severity cross-site scripting vulnerability in n/a, published on 7 May 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Sidekiq-cron thru 2.3.1, an open-source scheduling add-on for Sidekiq, is vulnerable to a cross-site scripting (xss) vulnerability via crafted URL being rended from cron.erb.
Weakness: CWE-79
Which versions are affected by CVE-2025-67202?
2 open source packages ship an affected version, including sidekiq-cron.
| Package | Affected | Fixed in |
|---|---|---|
sidekiq-cron RubyGems | All versions | 2.4.0 |
sidekiq-cron RubyGems | All versions | 2.4.0 |
How do I fix CVE-2025-67202?
Upgrade sidekiq-cron to 2.4.0 or later.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2025-67202 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-67202 exists.
Sources
Also known as GHSA-xv9c-mjw8-79gf.