XSS in Avo-hq Avo
CVE-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 return_to query parameter used in the avo interface. An attacker can craft a mali…
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.003 (18.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
Affected products
- Avo-hq Avo — versions < 3.30.3
- Avohq Avo
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC, Issue Tracking)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Product, x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-33209?
- CVE-2026-33209 is a medium-severity vulnerability in Avo-hq Avo, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-03-20.
- How severe is CVE-2026-33209?
- Medium severity. CVSS v3 base score is 6.1 out of 10.