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GHSA-762r-27w2-q22j

Avo has a XSS vulnerability on `return_to` param

Source: GitHub Advisory Database (reviewed) Moderate CVE-2026-33209

Packages

EcosystemPackageAffectedFixed in
RubyGems avo < 3.30.3 3.30.3

Details

As written in the advisory (Markdown source, shown as plain text).

## Description A reflected cross-site scripting (XSS) vulnerability exists in the `return_to` query parameter used in the avo interface. An attacker can craft a malicious URL that injects arbitrary JavaScript, which is executed when he clicks a dynamically generated navigation button. ## Impact This vulnerability may allow execution of arbitrary JavaScript in the context of the application. Impact varies depending on deployment: - In unauthenticated setups: exploitable via crafted links sent to users - In authenticated setups: limited to authenticated users and requires interaction

References

External links from the advisory. They lead to third-party sites.