Vulnerability-Lookup

GHSA-C4WC-GGRJ-JG9V

Vulnerability from github – Published: 2026-10-08 22:09 – Updated: 2026-10-08 22:09

Summary

Indico: Cross-Site-Scripting in link fields

Details

Impact

There is a Cross-Site-Scripting vulnerability in fields that allow entering custom URLs.

Patches

You should to update to Indico 3.3.13 as soon as possible. See the docs for instructions on how to update.

Workarounds

Set CSP_ENABLED = True in indico.conf - this is recommended regardless of updating.
Only let trustworthy users manage events or create content (including material uploads which speakers can typically do as well) on Indico.

For more information

If you have any questions or comments about this advisory:

Open a thread in our forum
Email us privately at indico-team@cern.ch

Severity

5.4 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

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JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "indico"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.3.13"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-107396"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-692"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-10-08T22:09:41Z",
    "nvd_published_at": "2026-10-08T20:17:34Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\nThere is a Cross-Site-Scripting vulnerability in fields that allow entering custom URLs.\n\n### Patches\nYou should to update to [Indico 3.3.13](https://github.com/indico/indico/releases/tag/v3.3.13) as soon as possible.\nSee [the docs](https://docs.getindico.io/en/stable/installation/upgrade/) for instructions on how to update.\n\n### Workarounds\n- Set `CSP_ENABLED = True` in `indico.conf` - **this is recommended regardless of updating**.\n- Only let trustworthy users manage events or create content (including material uploads which speakers can typically do as well) on Indico.\n\n### For more information\nIf you have any questions or comments about this advisory:\n\n- Open a thread in [our forum](https://talk.getindico.io/)\n- Email us privately at [indico-team@cern.ch](mailto:indico-team@cern.ch)",
  "id": "GHSA-c4wc-ggrj-jg9v",
  "modified": "2026-10-08T22:09:41Z",
  "published": "2026-10-08T22:09:41Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/indico/indico/security/advisories/GHSA-c4wc-ggrj-jg9v"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-107396"
    },
    {
      "type": "WEB",
      "url": "https://github.com/indico/indico/pull/7619"
    },
    {
      "type": "WEB",
      "url": "https://github.com/indico/indico/commit/d4c8c7127176efa4cb53c64119ca8ee2b551be18"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/indico/indico"
    },
    {
      "type": "WEB",
      "url": "https://github.com/indico/indico/releases/tag/v3.3.13"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Indico: Cross-Site-Scripting in link fields"
}

CVE-2026-107396 (GCVE-0-2026-107396)

Vulnerability from cvelistv5 – Published: 2026-10-08 20:00 – Updated: 2026-10-09 15:14

Title

Indico: Cross-Site-Scripting in link fields

Summary

Indico is an event management system that uses Flask-Multipass, a multi-backend authentication system for Flask. Prior to 3.3.13, users who can manage events or create content, including speakers who can upload material, can store crafted javascript URLs in fields that accept custom URLs. A user who follows one of these URLs can execute attacker-controlled script in the user's browser in the Indico origin. This issue is fixed in version 3.3.13.

Severity

5.4 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-08 20:23 UTC

CWE

CWE-692 - Incomplete Denylist to Cross-Site Scripting

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7595 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/indico/indico/security/advisor…	x_refsource_CONFIRM
https://github.com/indico/indico/pull/7619	x_refsource_MISC
https://github.com/indico/indico/commit/d4c8c7127…	x_refsource_MISC
https://github.com/indico/indico/releases/tag/v3.3.13	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
indico	indico	Affected: < 3.3.13

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-107396",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-08T20:23:12.111896Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-09T15:14:02.272Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "indico",
          "vendor": "indico",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.3.13"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Indico is an event management system that uses Flask-Multipass, a multi-backend authentication system for Flask. Prior to 3.3.13, users who can manage events or create content, including speakers who can upload material, can store crafted javascript URLs in fields that accept custom URLs. A user who follows one of these URLs can execute attacker-controlled script in the user\u0027s browser in the Indico origin. This issue is fixed in version 3.3.13."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.4,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-692",
              "description": "CWE-692: Incomplete Denylist to Cross-Site Scripting",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-08T20:00:04.340Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/indico/indico/security/advisories/GHSA-c4wc-ggrj-jg9v",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/indico/indico/security/advisories/GHSA-c4wc-ggrj-jg9v"
        },
        {
          "name": "https://github.com/indico/indico/pull/7619",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/indico/indico/pull/7619"
        },
        {
          "name": "https://github.com/indico/indico/commit/d4c8c7127176efa4cb53c64119ca8ee2b551be18",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/indico/indico/commit/d4c8c7127176efa4cb53c64119ca8ee2b551be18"
        },
        {
          "name": "https://github.com/indico/indico/releases/tag/v3.3.13",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/indico/indico/releases/tag/v3.3.13"
        }
      ],
      "source": {
        "advisory": "GHSA-c4wc-ggrj-jg9v",
        "discovery": "UNKNOWN"
      },
      "title": "Indico: Cross-Site-Scripting in link fields"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-107396",
    "datePublished": "2026-10-08T20:00:04.340Z",
    "dateReserved": "2026-10-07T21:07:54.989Z",
    "dateUpdated": "2026-10-09T15:14:02.272Z",
    "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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