CVE-2026-33209 Details
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.
A reflected cross-site scripting vulnerability has been identified in the Avo framework for Ruby on Rails applications, prior to version 3.30.3. The issue arises in the return_to query parameter within the Avo interface, allowing attackers to inject arbitrary JavaScript. This injected script is executed when the user clicks on a navigation button that has been dynamically generated. The vulnerability can be exploited by crafting a malicious URL that includes the harmful JavaScript payload.
Users can update to Avo version 3.30.3 or later to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 24, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/avo-hq/avo/commit/4453d39ddc6309f3bc8ada73ef21e1971112de7d | [email protected] | Patch |
| https://github.com/avo-hq/avo/pull/4330 | [email protected] | Issue TrackingPatch |
| https://github.com/avo-hq/avo/releases/tag/v3.30.3 | [email protected] | ProductRelease Notes |
| https://github.com/avo-hq/avo/security/advisories/GHSA-762r-27w2-q22j | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| avohq avo | < 3.30.3 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Mar 23, 2026 | Initial Analysis | [email protected] |
| Mar 20, 2026 | New CVE Received | [email protected] |