CVE-2026-33209: Avo has a XSS vulnerability on `return_to` param

March 18, 2026

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.

References

github.com/advisories/GHSA-762r-27w2-q22j
github.com/avo-hq/avo
github.com/avo-hq/avo/security/advisories/GHSA-762r-27w2-q22j
nvd.nist.gov/vuln/detail/CVE-2026-33209

Code Behaviors & Features

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