Vulnerability-Lookup

GHSA-762R-27W2-Q22J

Vulnerability from github – Published: 2026-03-18 17:26 – Updated: 2026-03-25 18:23

Summary

Avo has a XSS vulnerability on `return_to` param

Details

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

Severity

5.3 (Medium)


                  
                    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

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JSON

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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 3.30.2"
      },
      "package": {
        "ecosystem": "RubyGems",
        "name": "avo"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.30.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-33209"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-18T17:26:59Z",
    "nvd_published_at": "2026-03-20T23:16:45Z",
    "severity": "MODERATE"
  },
  "details": "## Description\n\nA reflected cross-site scripting (XSS) vulnerability exists in the `return_to` query parameter used in the avo interface.\n\nAn attacker can craft a malicious URL that injects arbitrary JavaScript, which is executed when he clicks a dynamically generated navigation button.\n\n## Impact\n\nThis vulnerability may allow execution of arbitrary JavaScript in the context of the application.\n\nImpact varies depending on deployment:\n- In unauthenticated setups: exploitable via crafted links sent to users\n- In authenticated setups: limited to authenticated users and requires interaction",
  "id": "GHSA-762r-27w2-q22j",
  "modified": "2026-03-25T18:23:10Z",
  "published": "2026-03-18T17:26:59Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/avo-hq/avo/security/advisories/GHSA-762r-27w2-q22j"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33209"
    },
    {
      "type": "WEB",
      "url": "https://github.com/avo-hq/avo/pull/4330"
    },
    {
      "type": "WEB",
      "url": "https://github.com/avo-hq/avo/commit/4453d39ddc6309f3bc8ada73ef21e1971112de7d"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/avo-hq/avo"
    },
    {
      "type": "WEB",
      "url": "https://github.com/avo-hq/avo/releases/tag/v3.30.3"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/avo/CVE-2026-33209.yml"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Avo has a XSS vulnerability on `return_to` param"
}

CVE-2026-33209 (GCVE-0-2026-33209)

Vulnerability from cvelistv5 – Published: 2026-03-20 22:39 – Updated: 2026-03-24 18:07

Title

Avo has a XSS vulnerability on `return_to` param

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.

Severity

5.3 (Medium)


                        
                          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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-03-24 18:06 UTC

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

GitHub_M mitre root Scorecard

References

4 references

URL	Tags
https://github.com/avo-hq/avo/security/advisories…	x_refsource_CONFIRM
https://github.com/avo-hq/avo/pull/4330	x_refsource_MISC
https://github.com/avo-hq/avo/commit/4453d39ddc63…	x_refsource_MISC
https://github.com/avo-hq/avo/releases/tag/v3.30.3	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
avo-hq	avo	Affected: < 3.30.3

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-33209",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-24T18:06:50.463947Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-24T18:07:25.007Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "avo",
          "vendor": "avo-hq",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.30.3"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "LOW",
            "subIntegrityImpact": "LOW",
            "userInteraction": "PASSIVE",
            "vectorString": "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",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-20T22:39:19.422Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/avo-hq/avo/security/advisories/GHSA-762r-27w2-q22j",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/avo-hq/avo/security/advisories/GHSA-762r-27w2-q22j"
        },
        {
          "name": "https://github.com/avo-hq/avo/pull/4330",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/avo-hq/avo/pull/4330"
        },
        {
          "name": "https://github.com/avo-hq/avo/commit/4453d39ddc6309f3bc8ada73ef21e1971112de7d",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/avo-hq/avo/commit/4453d39ddc6309f3bc8ada73ef21e1971112de7d"
        },
        {
          "name": "https://github.com/avo-hq/avo/releases/tag/v3.30.3",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/avo-hq/avo/releases/tag/v3.30.3"
        }
      ],
      "source": {
        "advisory": "GHSA-762r-27w2-q22j",
        "discovery": "UNKNOWN"
      },
      "title": "Avo has a XSS vulnerability on `return_to` param"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-33209",
    "datePublished": "2026-03-20T22:39:19.422Z",
    "dateReserved": "2026-03-17T23:23:58.312Z",
    "dateUpdated": "2026-03-24T18:07:25.007Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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