{"cve":"CVE-2026-33209","nvd":{"published":"2026-03-20T23:16:45.843","modified":"2026-06-17T10:37:07.670","status":"Analyzed","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.","cvss_v4":{"vector":"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","score":5.3},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-79"],"references":["https://github.com/avo-hq/avo/commit/4453d39ddc6309f3bc8ada73ef21e1971112de7d","https://github.com/avo-hq/avo/pull/4330","https://github.com/avo-hq/avo/releases/tag/v3.30.3","https://github.com/avo-hq/avo/security/advisories/GHSA-762r-27w2-q22j"],"products":["avohq:avo"],"source":"nvd","synced_at":"2026-10-19T22:26:19.218427112+00:00"},"epss":{"cve":"CVE-2026-33209","score":0.00268,"percentile":0.19045,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-762r-27w2-q22j","url":"https://osv.dev/vulnerability/GHSA-762r-27w2-q22j","summary":"Avo has a XSS vulnerability on `return_to` param","modified":"2026-03-25T19:47:54.819103Z","packages":[{"ecosystem":"RubyGems","name":"avo","purl":"pkg:gem/avo","ranges":["<3.30.3"],"fixed":["3.30.3"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}