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TI-2026-25630 Aliases CVE-2026-33209GHSA-762r-27w2-q22j

Avo has a XSS vulnerability on `return_to` param

Priority LOW 24CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
None · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00274 19th percentileScored 2026-11-07
Fix Fixed avo (avo-hq): 3.30.3avo (RubyGems): 3.30.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
avo-hqavobefore 3.30.33.30.3Patch availableCNA
—avo (RubyGems)before 3.30.33.30.3Patch availableGHSA-762r-27w2-q22j
  • avo Vendoravo-hq Affected before 3.30.3 Fixed in 3.30.3 Patch available CNA
  • avo (RubyGems) Vendor— Affected before 3.30.3 Fixed in 3.30.3 Patch available GHSA-762r-27w2-q22j

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:avohq:avo:*:*:*:*:*:ruby:*:*before 3.30.3Vulnerableavo-hq
  • cpe:2.3:a:avohq:avo:*:*:*:*:*:ruby:*:* Versions before 3.30.3 Vulnerable ·avo-hq

Remediation

  • Fix · CNA avo (avo-hq) Fixed in 3.30.3
  • Fix · GHSA-762r-27w2-q22j avo (RubyGems) Fixed in 3.30.3 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-33209
  2. 2026-10-03 Alias added: GHSA-762r-27w2-q22j

References

Patch 2

Advisory 2

Other 3

  • TI-2023-16948 Possible unsafe reflection / partial denial of service in avo CVSS 3.1HIGH 8.8
  • TI-2023-16949 Stored XSS (Cross Site Scripting) in html content based fields of avo CVSS 3.1HIGH 7.3
  • TI-2024-14784 Stored cross-site scripting (XSS) in `key_value` field in Avo CVSS 3.1HIGH 7.3
  • TI-2024-14985 Cross site scripting in Action messages on Avo CVSS 3.1MEDIUM 6.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences