CVE-2022-46181: Github.com/gotify/server Cross-Site Scripting Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-xv6x-456v-24xh",
  "modified" : "2022-12-30T00:58:09Z",
  "published" : "2022-12-30T00:58:09Z",
  "aliases" : [ "CVE-2022-46181" ],
  "summary" : "gotify/server vulnerable to Cross-site Scripting in the application image file upload",
  "details" : "### Impact\n\nThe XSS vulnerability allows authenticated users to upload .html files. With that, an attacker could execute client side scripts **if** another user opened a link, such as:\n\n```\nhttps://push.example.org/image/[alphanumeric string].html\n```\n\nAn attacker could potentially take over the account of the user that clicked the link. Keep in mind, the Gotify UI won't natively expose such a malicious link, so an attacker has to get the user to open the malicious link in a context outside of Gotify.\n\n### Patches\n\nThe vulnerability has been fixed in version 2.2.2.\n\n### Workarounds\n\nYou can block access to non image files via a reverse proxy in the `./image` directory.\n\n### References\n\nhttps://github.com/gotify/server/pull/534\nhttps://github.com/gotify/server/pull/535\n\n---\n\nThanks to rickshang (aka 无在无不在) for discovering and reporting this bug.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/gotify/server"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.2.2"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2.2.1"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/gotify/server/security/advisories/GHSA-xv6x-456v-24xh"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-46181"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/gotify/server/pull/534"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/gotify/server/pull/535"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/gotify/server"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-12-30T00:58:09Z",
    "nvd_published_at" : "2022-12-29T19:15:00Z"
  }
}