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
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
GHSA-fhx8-5c23-x7x5 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 379,145 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
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 |
Detection & 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
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-fhx8-5c23-x7x5 can be triaged on real exposure rather than presence alone.
Tailored to GHSA-fhx8-5c23-x7x5. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-fhx8-5c23-x7x5 in your dependencies?
O3 Security finds GHSA-fhx8-5c23-x7x5 across RubyGems dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.