{
"id": "GHSA-w4pj-7p68-3vgv",
"aliases": [
"CVE-2020-11083"
],
"details": "### Impact\nA user with access to a markdown FormWidget that stores data persistently could create a stored XSS attack against themselves and any other users with access to the generated HTML from the field.\n\n### Patches\nIssue has been patched in Build 466 (v1.0.466) & RainLab.Blog v1.4.1 by restricting the ability to store JS in markdown to only users that have been explicitly granted the `backend.allow_unsafe_markdown` permission.\n\n### Workarounds\nApply https://github.com/octobercms/october/commit/9ecfb4867baae14a0d3f99f5b5c1e8a979ae8746 & https://github.com/rainlab/blog-plugin/commit/6ae19a6e16ef3ba730692bc899851342c858bb94 to your installation manually if unable to upgrade to Build 466 or v1.4.1 of RainLab.Blog (if using that plugin).\n\n### References\nReported by [Sivanesh Ashok](https://stazot.com/)\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Email us at [[email protected] ](mailto:[email protected] )\n\n### Threat assessment:\n<img width=\"1100\" alt=\"Screen Shot 2020-03-31 at 2 01 52 PM\" src=\"https://user-images.githubusercontent.com/7253840/78070158-8f7ef580-7358-11ea-950c-226533f6a0a3.png\">",
"summary": "Stored XSS in October",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "1.0.319"
},
{
"fixed": "1.0.466"
}
]
}
],
"package": {
"name": "october/backend",
"ecosystem": "Packagist"
}
}
],
"modified": "2023-01-31T01:29:13Z",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N"
}
],
"published": "2020-08-05T14:52:44Z",
"references": [
{
"url": "https://github.com/octobercms/october/security/advisories/GHSA-w4pj-7p68-3vgv",
"type": "WEB"
},
{
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-11083",
"type": "ADVISORY"
},
{
"url": "https://github.com/octobercms/october/commit/9ecfb4867baae14a0d3f99f5b5c1e8a979ae8746",
"type": "WEB"
},
{
"url": "https://github.com/rainlab/blog-plugin/commit/6ae19a6e16ef3ba730692bc899851342c858bb94",
"type": "WEB"
},
{
"url": "http://packetstormsecurity.com/files/158730/October-CMS-Build-465-XSS-File-Read-File-Deletion-CSV-Injection.html",
"type": "WEB"
},
{
"url": "http://seclists.org/fulldisclosure/2020/Aug/2",
"type": "WEB"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-79"
],
"severity": "LOW",
"github_reviewed": true,
"nvd_published_at": "2020-07-14T21:15:00Z",
"github_reviewed_at": "2020-07-28T19:36:22Z"
}
}