Medium
Avo has a XSS vulnerability on `return_to` param
Type: advisorySources: OSV
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-33209
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 17:03 UTC · Revision 1
Source evidence
Avo has a XSS vulnerability on `return_to` param
core-osv · Original sourcePublished 20 Mar 2026, 22:39 UTC
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.
osv:CVE-2026-33209
Complete source record
{
"id": "50d9d3951a7140ab9f498b53cc62dc3be40e847cf6467413ca75d284d6bad82f",
"url": "https://osv.dev/vulnerability/CVE-2026-33209",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Avo has a XSS vulnerability on `return_to` param",
"summary": "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.",
"evidence": "osv:CVE-2026-33209",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2026-33209",
"aliases": [
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"GHSA-762r-27w2-q22j"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"
}
],
"affected": [
{
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"type": "GIT",
"events": [
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"source": "REFERENCES_COMMIT"
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"modified": "2026-10-28T02:30:37.888491334Z",
"provider": "osv",
"references": [
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"evidence": "/id"
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},
"source_id": "core-osv",
"document_id": 505126,
"published_at": "2026-03-20T22:39:19.422+00:00"
}