PYSEC-2026-1496

Vulnerability from pysec - Published: 2026-07-07 11:45 - Updated: 2026-07-07 17:24
VLAI
Details

Impact

Kiwi TCMS accepts SVG files uploaded by users which could potentially contain JavaScript code. If SVG images are viewed directly, i.e. not rendered in an HTML page, this JavaScript code could execute.

Patches

This vulnerability has been fixed by configuring Kiwi TCMS to serve with the Content-Security-Policy HTTP header which blocks inline JavaScript in all modern browsers.

Workarounds

Configure Content-Security-Policy header, see commit 6617cee0.

References

You can visit https://digi.ninja/blog/svg_xss.php for more technical details.

Independently disclosed by Antonio Spataro and @1d8.

Severity
7.6 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L
Impacted products
Name purl
kiwitcms pkg:pypi/kiwitcms
Aliases
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "kiwitcms",
        "purl": "pkg:pypi/kiwitcms"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "12.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "10.0",
        "10.1",
        "10.2",
        "10.3",
        "10.3.999",
        "10.4",
        "10.5",
        "11.0",
        "11.1",
        "11.3",
        "11.4",
        "11.5",
        "11.6",
        "11.7",
        "12.0",
        "6.10",
        "6.11",
        "6.2.1",
        "6.3",
        "6.4",
        "6.5",
        "6.5.3",
        "6.6",
        "6.7",
        "6.8",
        "6.9",
        "7.0",
        "7.1",
        "7.2",
        "7.2.1",
        "7.3",
        "8.0",
        "8.1",
        "8.1.99",
        "8.2",
        "8.3",
        "8.4",
        "8.5",
        "8.6",
        "8.6.1",
        "8.7",
        "8.8",
        "8.9",
        "9.0",
        "9.999"
      ]
    }
  ],
  "aliases": [
    "CVE-2023-27489",
    "GHSA-2wcr-87wf-cf9j"
  ],
  "details": "### Impact\nKiwi TCMS accepts SVG files uploaded by users which could potentially contain JavaScript code. If SVG images are viewed directly, i.e. not rendered in an HTML page, this JavaScript code could execute. \n\n### Patches\nThis vulnerability has been fixed by configuring Kiwi TCMS to serve with the Content-Security-Policy HTTP header which blocks inline JavaScript in all modern browsers.\n\n### Workarounds\nConfigure Content-Security-Policy header, see [commit 6617cee0](https://github.com/kiwitcms/Kiwi/commit/6617cee0fb70cc394b7be6bbc86ef84e6e9de077).\n\n### References\nYou can visit https://digi.ninja/blog/svg_xss.php for more technical details.\n\nIndependently disclosed by [Antonio Spataro](https://huntr.dev/bounties/bf99001b-a0a2-4f7d-98cd-983bc7f14a69/) and [@1d8](https://huntr.dev/bounties/f8c73bcc-02f3-4c65-a92b-1caa4d67c2fd/).",
  "id": "PYSEC-2026-1496",
  "modified": "2026-07-07T17:24:26.043715Z",
  "published": "2026-07-07T11:45:17.732551Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/kiwitcms/Kiwi/security/advisories/GHSA-2wcr-87wf-cf9j"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-27489"
    },
    {
      "type": "FIX",
      "url": "https://github.com/kiwitcms/Kiwi/commit/6617cee0fb70cc394b7be6bbc86ef84e6e9de077"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/kiwitcms/Kiwi"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/kiwitcms"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-2wcr-87wf-cf9j"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Kiwi TCMS Stored Cross-site Scripting via SVG file"
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.



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