CVE-2026-33209
published 2026-03-20CVE-2026-33209: 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…
PriorityP429medium6.1CVSS 3.1
AVNACLPRNUIRSCCLILAN
EPSS
0.26%
18.5th percentile
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.
Affected
3 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| avo-hq | avo | < 3.30.3 | 3.30.3 |
| avo-hq | avo | >= 0 < 3.30.3 | 3.30.3 |
| avohq | avo | < 3.30.3 | 3.30.3 |
CVSS provenance
nvdv3.16.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
nvdv4.05.3MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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OSV
Avo has a XSS vulnerability on `return_to` param
osv·2026-03-18
CVE-2026-33209 [MEDIUM] Avo has a XSS vulnerability on `return_to` param
Avo has a XSS vulnerability on `return_to` param
## 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
GHSA
Avo has a XSS vulnerability on `return_to` param
ghsa·2026-03-18
CVE-2026-33209 [MEDIUM] CWE-79 Avo has a XSS vulnerability on `return_to` param
Avo has a XSS vulnerability on `return_to` param
## 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
No detection rules found.
No public exploits indexed.
2026-03-20
Published