PYSEC-2026-2182

Vulnerability from pysec - Published: 2026-02-19 16:27 - Updated: 2026-07-13 05:49
VLAI
Details

Indico is an event management system that uses Flask-Multipass, a multi-backend authentication system for Flask. Versions prior to 3.3.10 are vulnerable to cross-site scripting when uploading certain file types as materials. Users should upgrade to version 3.3.10 to receive a patch. To apply the fix itself updating is sufficient, but to benefit from the strict Content Security Policy (CSP) Indico now applies by default for file downloads, update the webserver config in case one uses nginx with Indico's STATIC_FILE_METHOD set to xaccelredirect. For further directions, consult the GitHub Security advisory or Indico setup documentation. Some workarounds are available. Use the webserver config to apply a strict CSP for material download endpoints, and/or only let trustworthy users create content (including material uploads, which speakers can typically do as well) on Indico.

Severity
5.4 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Impacted products
Name purl
indico pkg:pypi/indico
Aliases
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {},
      "package": {
        "ecosystem": "PyPI",
        "name": "indico",
        "purl": "pkg:pypi/indico"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.3.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.98-rc1",
        "0.98.0",
        "0.98.1",
        "0.98.2",
        "0.99",
        "1.0",
        "1.1",
        "1.1.1",
        "1.1.2",
        "1.2",
        "1.2.1",
        "1.2.1rc10",
        "1.2.1rc11",
        "1.2.1rc2",
        "1.2.1rc4",
        "1.2.1rc5",
        "1.2.1rc6",
        "1.2.1rc7",
        "1.2.1rc9",
        "1.2.2",
        "1.2.2rc1",
        "1.9.11.dev10",
        "1.9.11.dev11",
        "1.9.11.dev12",
        "1.9.11.dev13",
        "1.9.11.dev14",
        "1.9.11.dev15",
        "1.9.11.dev16",
        "1.9.11.dev17",
        "1.9.11.dev3",
        "1.9.11.dev4",
        "1.9.11.dev6",
        "1.9.11.dev7",
        "1.9.11.dev8",
        "1.9.11.dev9",
        "2.0",
        "2.0.1",
        "2.0.2",
        "2.0.3",
        "2.0a1",
        "2.0rc1",
        "2.0rc2",
        "2.1",
        "2.1.1",
        "2.1.10",
        "2.1.11",
        "2.1.2",
        "2.1.3",
        "2.1.4",
        "2.1.5",
        "2.1.6",
        "2.1.7",
        "2.1.8",
        "2.1.9",
        "2.2",
        "2.2.1",
        "2.2.2",
        "2.2.3",
        "2.2.4",
        "2.2.5",
        "2.2.6",
        "2.2.7",
        "2.2.8",
        "2.3",
        "2.3.1",
        "2.3.2",
        "2.3.3",
        "2.3.4",
        "2.3.5",
        "3.0",
        "3.0.1",
        "3.0.2",
        "3.0.3",
        "3.0rc1",
        "3.0rc2",
        "3.1",
        "3.1.1",
        "3.2",
        "3.2.1",
        "3.2.2",
        "3.2.3",
        "3.2.4",
        "3.2.5",
        "3.2.6",
        "3.2.7",
        "3.2.8",
        "3.2.9",
        "3.3",
        "3.3.1",
        "3.3.2",
        "3.3.3",
        "3.3.4",
        "3.3.5",
        "3.3.6",
        "3.3.7",
        "3.3.8",
        "3.3.9"
      ]
    }
  ],
  "aliases": [
    "CVE-2026-25739",
    "GHSA-jxc4-54g3-j7vp"
  ],
  "details": "Indico is an event management system that uses Flask-Multipass, a multi-backend authentication system for Flask. Versions prior to 3.3.10 are vulnerable to cross-site scripting when uploading certain file types as materials. Users should upgrade to version 3.3.10 to receive a patch. To apply the fix itself updating is sufficient, but to benefit from the strict Content Security Policy (CSP) Indico now applies by default for file downloads, update the webserver config in case one uses nginx with Indico\u0027s `STATIC_FILE_METHOD` set to `xaccelredirect`. For further directions, consult the GitHub Security advisory or Indico setup documentation. Some workarounds are available. Use the webserver config to apply a strict CSP for material download endpoints, and/or only let trustworthy users create content (including material uploads, which speakers can typically do as well) on Indico.",
  "id": "PYSEC-2026-2182",
  "modified": "2026-07-13T05:49:10.741135Z",
  "published": "2026-02-19T16:27:15.270Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/indico/indico/releases/tag/v3.3.10"
    },
    {
      "type": "FIX",
      "url": "https://github.com/indico/indico/security/advisories/GHSA-jxc4-54g3-j7vp"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}



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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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