ghsa-cq88-842x-2jhp
Vulnerability from github
Published
2025-04-04 14:09
Modified
2025-04-07 19:52
Severity ?
4.8 (Medium) - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
Summary
Miniflux Media Proxy vulnerable to Stored Cross-site Scripting due to improper Content-Security-Policy configuration
Details

Summary

Due to a weak Content Security Policy on the /proxy/* route, an attacker can bypass the CSP of the media proxy and execute cross-site scripting when opening external images in a new tab/window.

Impact

A malicious feed added to Miniflux can execute arbitrary JavaScript in the user's browser when opening external resources, such as proxified images, in a new tab or window.

Mitigation

The CSP for the media proxy has been changed from default-src 'self' to default-src 'none'; form-action 'none'; sandbox;.

Upgrade to Miniflux >= 2.2.7

Credit

RyotaK (GMO Flatt Security Inc.) with takumi-san.ai

Show details on source website

To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "miniflux.app/v2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.2.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-31483"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-04-04T14:09:40Z",
    "nvd_published_at": "2025-04-03T18:15:47Z",
    "severity": "MODERATE"
  },
  "details": "## Summary\n\nDue to a weak Content Security Policy on the `/proxy/*` route, an attacker can bypass the CSP of the media proxy and execute cross-site scripting when opening external images in a new tab/window.\n\n## Impact\n\nA malicious feed added to Miniflux can execute arbitrary JavaScript in the user\u0027s browser when opening external resources, such as proxified images, in a new tab or window.\n\n## Mitigation\n\nThe CSP for the media proxy has been changed from `default-src \u0027self\u0027` to `default-src \u0027none\u0027; form-action \u0027none\u0027; sandbox;`.\n\nUpgrade to Miniflux \u003e= 2.2.7\n\n## Credit\n[RyotaK](https://ryotak.net) (GMO Flatt Security Inc.) with [takumi-san.ai](https://takumi-san.ai)",
  "id": "GHSA-cq88-842x-2jhp",
  "modified": "2025-04-07T19:52:04Z",
  "published": "2025-04-04T14:09:40Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/miniflux/v2/security/advisories/GHSA-cq88-842x-2jhp"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-31483"
    },
    {
      "type": "WEB",
      "url": "https://github.com/miniflux/v2/commit/cb695e653a08af4cabcb277c271ce74bd0c746e6"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/miniflux/v2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Miniflux Media Proxy vulnerable to Stored Cross-site Scripting due to improper Content-Security-Policy configuration"
}


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