CVE-2026-33209 | THREATINT

Description

Avo is a framework to create admin panels for Ruby on Rails apps. Prior to version 3.30.3, 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. This issue has been patched in version 3.30.3.

PUBLISHED Reserved 2026-03-17 | Published 2026-03-20 | Updated 2026-03-24 | Assigner GitHub_M

MEDIUM: 5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Problem types

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

< 3.30.3

affected

References

github.com/...hq/avo/security/advisories/GHSA-762r-27w2-q22j

github.com/avo-hq/avo/pull/4330

github.com/...ommit/4453d39ddc6309f3bc8ada73ef21e1971112de7d

github.com/avo-hq/avo/releases/tag/v3.30.3

cve.org (CVE-2026-33209)

nvd.nist.gov (CVE-2026-33209)

Download JSON