GHSA-4Q96-6XHQ-FF43

Vulnerability from github – Published: 2020-11-11 15:54 – Updated: 2024-10-07 15:01
VLAI?
Summary
malicious SVG attachment causing stored XSS vulnerability
Details

Impact

An attacker with write permissions can upload an SVG file that contains malicious javascript. This javascript will be executed in a user's browser when the user is viewing that SVG file on the wiki.

Patches

Users are strongly advised to upgrade to a patched version.

MoinMoin Wiki 1.9.11 has the necessary fixes and also contains other important fixes.

Workarounds

It is not advised to work around this, but to upgrade MoinMoin to a patched version.

That said, a work around via a Content Security Policy in the web server might be possible.

Also, it is of course helpful if you give write permissions (which include uploading attachments) only to trusted users.

For more information

If you have any questions or comments about this advisory, email me at twaldmann@thinkmo.de.

Credits

This vulnerability was discovered by:

Catarina Leite from the Checkmarx SCA AppSec team

Severity ?
8.7 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
6.4 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "moin"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.9.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2020-15275"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2020-11-11T15:49:35Z",
    "nvd_published_at": "2020-11-11T16:15:00Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\nAn attacker with `write` permissions can upload an SVG file that contains malicious javascript. This javascript will be executed in a user\u0027s browser when the user is viewing that SVG file on the wiki.\n\n### Patches\nUsers are strongly advised to upgrade to a patched version.\n\nMoinMoin Wiki 1.9.11 has the necessary fixes and also contains other important fixes.\n\n### Workarounds\nIt is not advised to work around this, but to upgrade MoinMoin to a patched version.\n\nThat said, a work around via a Content Security Policy in the web server might be possible.\n\nAlso, it is of course helpful if you give `write` permissions (which include uploading attachments) only to trusted users.\n\n### For more information\nIf you have any questions or comments about this advisory, email me at [twaldmann@thinkmo.de](mailto:twaldmann@thinkmo.de).\n\n### Credits\n\nThis vulnerability was discovered by:\n\nCatarina Leite from the Checkmarx SCA AppSec team",
  "id": "GHSA-4q96-6xhq-ff43",
  "modified": "2024-10-07T15:01:08Z",
  "published": "2020-11-11T15:54:41Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/moinwiki/moin-1.9/security/advisories/GHSA-4q96-6xhq-ff43"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-15275"
    },
    {
      "type": "WEB",
      "url": "https://github.com/moinwiki/moin-1.9/commit/31de9139d0aabc171e94032168399b4a0b2a88a2"
    },
    {
      "type": "WEB",
      "url": "https://advisory.checkmarx.net/advisory/CX-2020-4285"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/moinwiki/moin-1.9"
    },
    {
      "type": "WEB",
      "url": "https://github.com/moinwiki/moin-1.9/releases/tag/1.9.11"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/moin/PYSEC-2020-241.yaml"
    },
    {
      "type": "WEB",
      "url": "https://pypi.org/project/moin"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "malicious SVG attachment causing stored XSS vulnerability"
}


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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.
  • 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.



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