Read the docs
TI-2023-16948 Aliases CVE-2023-34102GHSA-86h2-2g4g-29qx

Possible unsafe reflection / partial denial of service in avo

Priority HIGH 73CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub.

Summary

Avo is an open source ruby on rails admin panel creation framework. The polymorphic field type stores the classes to operate on when updating a record with user input, and does not validate them in the back end. This can lead to unexpected behavior, remote code execution, or application crashes when viewing a manipulated record. This issue has been addressed in commit `ec117882d` which is expected to be included in subsequent releases. Users are advised to limit access to untrusted users until a new release is made.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0161 76th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed avo (RubyGems): 2.33.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

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-hqavoup to 2.33.2; 3.0.0.pre1 – 3.0.0.pre12—No fix listedCNA
—avo (RubyGems)before 2.33.32.33.3Patch availableGHSA-86h2-2g4g-29qx
—avo (RubyGems)3.0.0.pre1 – 3.0.0.pre12—No fix listedGHSA-86h2-2g4g-29qx
  • avo Vendoravo-hq Affected up to 2.33.2; 3.0.0.pre1 – 3.0.0.pre12 Fixed in — No fix listed CNA
  • avo (RubyGems) Vendor— Affected before 2.33.3 Fixed in 2.33.3 Patch available GHSA-86h2-2g4g-29qx
  • avo (RubyGems) Vendor— Affected 3.0.0.pre1 – 3.0.0.pre12 Fixed in — No fix listed GHSA-86h2-2g4g-29qx

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:avohq:avo:*:*:*:*:*:ruby:*:*up to 2.33.2Vulnerableavo-hq
cpe:2.3:a:avohq:avo:3.0.0:pre12:*:*:*:ruby:*:*3.0.0 pre12Vulnerableavo-hq
  • cpe:2.3:a:avohq:avo:*:*:*:*:*:ruby:*:* Versions up to 2.33.2 Vulnerable ·avo-hq
  • cpe:2.3:a:avohq:avo:3.0.0:pre12:*:*:*:ruby:*:* Versions 3.0.0 pre12 Vulnerable ·avo-hq

Remediation

  • Fix · GHSA-86h2-2g4g-29qx avo (RubyGems) Fixed in 2.33.3 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-34102
  2. 2026-10-03 Alias added: GHSA-86h2-2g4g-29qx

References

Exploit 1

Patch 1

Advisory 1

Other 3

  • 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
  • TI-2026-25630 Avo has a XSS vulnerability on `return_to` param CVSS 4.0MEDIUM 5.3

Sources

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