GHSA-fhx8-5c23-x7x5 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in sidekiq-unique-jobs. A fix is available for sidekiq-unique-jobs — see the affected versions and patch details below.
Cross Site Scripting vulnerability in Contribsys Sidekiq
Exploitation Status
Proof-of-concept exploit code exists
- CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.
Exploitation and automatability from CISA’s SSVC triage for GHSA-fhx8-5c23-x7x5.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
GHSA-fhx8-5c23-x7x5 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.
Where this sits among everything scored
Of 379,842 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.
Real-World Exposure
sidekiq-unique-jobs💎sidekiq-unique-jobsReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects RubyGems packages — download data is not available via public APIs for these ecosystems.
Description
Cross Site Scripting vulnerability in Contribsys Sidekiq v.6.5.8 allows a remote attacker to obtain sensitive information via a crafted URL to the filter functions.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 💎RubyGems | sidekiq-unique-jobs | ≥ 8.0.0&&< 8.0.7 | 8.0.7bundle update sidekiq-unique-jobs --conservative |
| 💎RubyGems | sidekiq-unique-jobs | all versions | 7.1.33bundle update sidekiq-unique-jobs --conservative |
Affected Products
sidekiqcontribsysDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for sidekiq-unique-jobs, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update sidekiq-unique-jobs to 8.0.7 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-fhx8-5c23-x7x5 is resolved across your whole dependency graph.
Workarounds
Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.
Frequently Asked Questions
Is GHSA-fhx8-5c23-x7x5 in your dependencies?
Find it across RubyGems, including transitive dependencies.